- Add support for the [MSC4260 user report API](https://github.com/matrix-org/matrix-spec-proposals/pull/4260). ([\#18120](https://github.com/element-hq/synapse/issues/18120)) - Fix an issue where, during state resolution for v11 rooms, Synapse would incorrectly calculate the power level of the creator when there was no power levels event in the room. ([\#18534](https://github.com/element-hq/synapse/issues/18534), [\#18547](https://github.com/element-hq/synapse/issues/18547)) - Fix long-standing bug where sliding sync did not honour the `room_id_to_include` config option. ([\#18535](https://github.com/element-hq/synapse/issues/18535)) - Fix an issue where "Lock timeout is getting excessive" warnings would be logged even when the lock timeout was <10 minutes. ([\#18543](https://github.com/element-hq/synapse/issues/18543)) - Fix an issue where Synapse could calculate the wrong power level for the creator of the room if there was no power levels event. ([\#18545](https://github.com/element-hq/synapse/issues/18545)) - Generate config documentation from JSON Schema file. ([\#18528](https://github.com/element-hq/synapse/issues/18528)) - Fix typo in user type documentation. ([\#18568](https://github.com/element-hq/synapse/issues/18568)) - Increase performance of introspecting access tokens when using delegated auth. ([\#18357](https://github.com/element-hq/synapse/issues/18357), [\#18561](https://github.com/element-hq/synapse/issues/18561)) - Log user deactivations. ([\#18541](https://github.com/element-hq/synapse/issues/18541)) - Enable [`flake8-logging`](https://docs.astral.sh/ruff/rules/#flake8-logging-log) and [`flake8-logging-format`](https://docs.astral.sh/ruff/rules/#flake8-logging-format-g) rules in Ruff and fix related issues throughout the codebase. ([\#18542](https://github.com/element-hq/synapse/issues/18542)) - Clean up old, unused rows from the `device_federation_inbox` table. ([\#18546](https://github.com/element-hq/synapse/issues/18546)) - Run config schema CI on develop and release branches. ([\#18551](https://github.com/element-hq/synapse/issues/18551)) - Add support for Twisted `25.5.0`+ releases. ([\#18577](https://github.com/element-hq/synapse/issues/18577)) - Update PyO3 to version 0.25. ([\#18578](https://github.com/element-hq/synapse/issues/18578)) * Bump actions/setup-python from 5.5.0 to 5.6.0. ([\#18555](https://github.com/element-hq/synapse/issues/18555)) * Bump base64 from 0.21.7 to 0.22.1. ([\#18559](https://github.com/element-hq/synapse/issues/18559)) * Bump dawidd6/action-download-artifact from 9 to 11. ([\#18556](https://github.com/element-hq/synapse/issues/18556)) * Bump headers from 0.4.0 to 0.4.1. ([\#18529](https://github.com/element-hq/synapse/issues/18529)) * Bump requests from 2.32.2 to 2.32.4. ([\#18533](https://github.com/element-hq/synapse/issues/18533)) * Bump types-requests from 2.32.0.20250328 to 2.32.4.20250611. ([\#18558](https://github.com/element-hq/synapse/issues/18558))