Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

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Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

Co-authored-by: Andrew Morgan <andrew@amorgan.xyz>

This adds a counter `synapse_emails_sent_total` for emails sent. They
are broken down by `type`, which are `password_reset`, `registration`,
`add_threepid`, `notification` (matching the methods of `Mailer`).

We do this by adding support to the LRU cache for "extra indices" based
on the cached value. This allows us to efficiently map from room ID to
the cached events and only invalidate those.

List of users not to send out device list updates for when they register
new devices. This is useful to handle bot accounts.

This is undocumented as its mostly a hack to test on matrix.org.

Note: This will still send out device list updates if the device is
later updated, e.g. end to end keys are added.

Bumps [bcrypt](https://github.com/pyca/bcrypt) from 4.0.1 to 4.1.2.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pyca/bcrypt/commit/b9223e61e2aec6f2d4841e3fa1f8e5d1ab7e4b61"><code>b9223e6</code></a>
Try building py39 wheels to see if that helps with reinitialization
errors (#...</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/504978344416eb7128142e0fa40cc2d472c194e5"><code>5049783</code></a>
Bump syn from 2.0.40 to 2.0.41 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/696">#696</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/642d0709725fd1d376a72868042ff756e53e5ebf"><code>642d070</code></a>
Bump syn from 2.0.39 to 2.0.40 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/693">#693</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/8b44a1046a23499f9f8e91a4b2c375fecb511fa2"><code>8b44a10</code></a>
Bump libc from 0.2.150 to 0.2.151 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/692">#692</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/951cc64d0cb7df2345a6c1bf0c983645a8020e9f"><code>951cc64</code></a>
Bump once_cell from 1.18.0 to 1.19.0 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/690">#690</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/7377c6db3a51ade1c330b27d7eccf3a02b2b9a90"><code>7377c6d</code></a>
Bump actions/setup-python from 4.8.0 to 5.0.0 (<a
href="https://redirect.github.com/pyca/bcrypt/issues/689">#689</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/61b32039d4cd657dd25d9f32bea15b066880e2a6"><code>61b3203</code></a>
Bump actions/setup-python from 4.7.1 to 4.8.0 (<a
href="https://redirect.github.com/pyca/bcrypt/issues/688">#688</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/1c3159a28a88a2755149e73dfd1334a2b571c3f5"><code>1c3159a</code></a>
Fixed wheels for older versions of macOS (<a
href="https://redirect.github.com/pyca/bcrypt/issues/687">#687</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/1a41437d3a38b856ed2d85161fecd28ffbc82fc6"><code>1a41437</code></a>
Update README.rst (<a
href="https://redirect.github.com/pyca/bcrypt/issues/682">#682</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/7881c5beef0a8e00ecfd6a6decc3b5ba3a55db1c"><code>7881c5b</code></a>
Fix building windows abi3 wheels (<a
href="https://redirect.github.com/pyca/bcrypt/issues/681">#681</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/pyca/bcrypt/compare/4.0.1...4.1.2">compare
view</a></li>
</ul>
</details>
<br />


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Bumps [sentry-sdk](https://github.com/getsentry/sentry-python) from
1.40.0 to 1.40.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/getsentry/sentry-python/releases">sentry-sdk's
releases</a>.</em></p>
<blockquote>
<h2>1.40.3</h2>
<h3>Various fixes &amp; improvements</h3>
<ul>
<li>Turn off metrics for uWSGI (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2720">#2720</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Minor improvements (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2714">#2714</a>)
by <a
href="https://github.com/antonpirker"><code>@​antonpirker</code></a></li>
</ul>
<h2>1.40.2</h2>
<h3>Various fixes &amp; improvements</h3>
<ul>
<li>test: Fix <code>pytest</code> error (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2712">#2712</a>)
by <a
href="https://github.com/szokeasaurusrex"><code>@​szokeasaurusrex</code></a></li>
<li>build(deps): bump types-protobuf from 4.24.0.4 to 4.24.0.20240129
(<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2691">#2691</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
</ul>
<h2>1.40.1</h2>
<h3>Various fixes &amp; improvements</h3>
<ul>
<li>Fix uWSGI workers hanging (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2694">#2694</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Make metrics work with <code>gevent</code> (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2694">#2694</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Guard against <code>engine.url</code> being <code>None</code> (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2708">#2708</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Fix performance regression in
<code>sentry_sdk.utils._generate_installed_modules</code> (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2703">#2703</a>)
by <a
href="https://github.com/GlenWalker"><code>@​GlenWalker</code></a></li>
<li>Guard against Sentry initialization mid SQLAlchemy cursor (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2702">#2702</a>)
by <a
href="https://github.com/apmorton"><code>@​apmorton</code></a></li>
<li>Fix yaml generation script (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2695">#2695</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Fix AWS Lambda workflow (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2710">#2710</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Bump <code>codecov/codecov-action</code> from 3 to 4 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2706">#2706</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>actions/cache</code> from 3 to 4 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2661">#2661</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>actions/checkout</code> from 3.1.0 to 4.1.1 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2561">#2561</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>github/codeql-action</code> from 2 to 3 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2603">#2603</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>actions/setup-python</code> from 4 to 5 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2577">#2577</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/getsentry/sentry-python/blob/master/CHANGELOG.md">sentry-sdk's
changelog</a>.</em></p>
<blockquote>
<h2>1.40.3</h2>
<h3>Various fixes &amp; improvements</h3>
<ul>
<li>Turn off metrics for uWSGI (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2720">#2720</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Minor improvements (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2714">#2714</a>)
by <a
href="https://github.com/antonpirker"><code>@​antonpirker</code></a></li>
</ul>
<h2>1.40.2</h2>
<h3>Various fixes &amp; improvements</h3>
<ul>
<li>test: Fix <code>pytest</code> error (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2712">#2712</a>)
by <a
href="https://github.com/szokeasaurusrex"><code>@​szokeasaurusrex</code></a></li>
<li>build(deps): bump types-protobuf from 4.24.0.4 to 4.24.0.20240129
(<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2691">#2691</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
</ul>
<h2>1.40.1</h2>
<h3>Various fixes &amp; improvements</h3>
<ul>
<li>Fix uWSGI workers hanging (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2694">#2694</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Make metrics work with <code>gevent</code> (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2694">#2694</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Guard against <code>engine.url</code> being <code>None</code> (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2708">#2708</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Fix performance regression in
<code>sentry_sdk.utils._generate_installed_modules</code> (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2703">#2703</a>)
by <a
href="https://github.com/GlenWalker"><code>@​GlenWalker</code></a></li>
<li>Guard against Sentry initialization mid SQLAlchemy cursor (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2702">#2702</a>)
by <a
href="https://github.com/apmorton"><code>@​apmorton</code></a></li>
<li>Fix yaml generation script (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2695">#2695</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Fix AWS Lambda workflow (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2710">#2710</a>)
by <a
href="https://github.com/sentrivana"><code>@​sentrivana</code></a></li>
<li>Bump <code>codecov/codecov-action</code> from 3 to 4 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2706">#2706</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>actions/cache</code> from 3 to 4 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2661">#2661</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>actions/checkout</code> from 3.1.0 to 4.1.1 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2561">#2561</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>github/codeql-action</code> from 2 to 3 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2603">#2603</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
<li>Bump <code>actions/setup-python</code> from 4 to 5 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2577">#2577</a>)
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/getsentry/sentry-python/commit/84c4c127ffa53084b082bdb9630ac1d01e36b0d0"><code>84c4c12</code></a>
Update CHANGELOG.md</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/f92b4f2247be23e21f4797f848fb0621bedb64df"><code>f92b4f2</code></a>
release: 1.40.3</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/f23bdd32fef72ddc4590c574e9f14786e2aa0cf1"><code>f23bdd3</code></a>
fix(metrics): Turn off metrics for uWSGI (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2720">#2720</a>)</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/c77a1235f4d4f4d88129c13fa9586840ede48ce4"><code>c77a123</code></a>
Minor improvements (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2714">#2714</a>)</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/2186e227a5110ae71753e6cb8d83ffbbe683b72e"><code>2186e22</code></a>
Merge branch 'release/1.40.2'</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/139469a01ff6e720c22200747750ad3e770b1367"><code>139469a</code></a>
release: 1.40.2</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/d97e7d75f740942adfd61742372747b041a76228"><code>d97e7d7</code></a>
test: Fix <code>pytest</code> error (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2712">#2712</a>)</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/60e644c8e322a13c5a31ff93d25608d24cb58d51"><code>60e644c</code></a>
build(deps): bump types-protobuf from 4.24.0.4 to 4.24.0.20240129 (<a
href="https://redirect.github.com/getsentry/sentry-python/issues/2691">#2691</a>)</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/d769becc925e0d25c4fd80e95c0a61a6751d04f5"><code>d769bec</code></a>
Merge branch 'release/1.40.1'</li>
<li><a
href="https://github.com/getsentry/sentry-python/commit/ad25ed961bae0c6d93dfcd5bb0635c3325a33f05"><code>ad25ed9</code></a>
Update CHANGELOG.md</li>
<li>Additional commits viewable in <a
href="https://github.com/getsentry/sentry-python/compare/1.40.0...1.40.3">compare
view</a></li>
</ul>
</details>
<br />


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Otherwise if we've stacked a bunch of requests for the keys of a server,
we'll end up sending lots of concurrent requests for its keys,
needlessly.

This basically reverts a change that was in
https://github.com/element-hq/synapse/pull/16833, where we reduced the
batching.

The smaller batching can cause performance issues on busy servers and
databases.

Now that the MSC3981 has passed FCP

ICU is an optional dependency and also a pain to install. Mention that
you can just not install it and still get a working installation.

Some links seemed to be incorrect (vector-im/sygnal and vector-im/sytest
have never been A Thing iirc) so pointed them back to matrix-org/*).