Merge branch 'tracing_flame' into 'master'

Cargo.lock

Cargo.toml

src/appservice_server.rs

src/client_server/account.rs

src/client_server/directory.rs

src/client_server/membership.rs

src/client_server/room.rs

src/client_server/session.rs

src/client_server/sync.rs

src/client_server/to_device.rs

src/database.rs

src/database/abstraction.rs

src/database/abstraction/heed.rs

src/database/abstraction/sled.rs

src/database/abstraction/sqlite.rs

src/database/account_data.rs

src/database/admin.rs

src/database/globals.rs

src/database/pusher.rs

src/database/rooms.rs