- Fix regression when using OIDC provider. Introduced in v1.104.0rc1. ([\#17031](https://github.com/element-hq/synapse/issues/17031))

- Add an OIDC config to specify extra parameters for the authorization grant URL. IT can be useful to pass an ACR value for example. ([\#16971](https://github.com/element-hq/synapse/issues/16971))
- Add support for OIDC provider returning JWT. ([\#16972](https://github.com/element-hq/synapse/issues/16972), [\#17031](https://github.com/element-hq/synapse/issues/17031))

- Fix a bug which meant that, under certain circumstances, we might never retry sending events or to-device messages over federation after a failure. ([\#16925](https://github.com/element-hq/synapse/issues/16925))
- Fix various long-standing bugs which could cause incorrect state to be returned from `/sync` in certain situations. ([\#16949](https://github.com/element-hq/synapse/issues/16949))
- Fix case in which `m.fully_read` marker would not get updated. Contributed by @SpiritCroc. ([\#16990](https://github.com/element-hq/synapse/issues/16990))
- Fix bug which did not retract a user's pending knocks at rooms when their account was deactivated. Contributed by @hanadi92. ([\#17010](https://github.com/element-hq/synapse/issues/17010))

- Updated `start.py` to generate config using the correct user ID when running as root (fixes [\#16824](https://github.com/element-hq/synapse/issues/16824), [\#15202](https://github.com/element-hq/synapse/issues/15202)). ([\#16978](https://github.com/element-hq/synapse/issues/16978))

- Add a query to force a refresh of a remote user's device list to the "Useful SQL for Admins" documentation page. ([\#16892](https://github.com/element-hq/synapse/issues/16892))
- Minor grammatical corrections to the upgrade documentation. ([\#16965](https://github.com/element-hq/synapse/issues/16965))
- Fix the sort order for the documentation version picker, so that newer releases appear above older ones. ([\#16966](https://github.com/element-hq/synapse/issues/16966))
- Remove recommendation for a specific poetry version from contributing guide. ([\#17002](https://github.com/element-hq/synapse/issues/17002))

- Improve lock performance when a lot of locks are all waiting for a single lock to be released. ([\#16840](https://github.com/element-hq/synapse/issues/16840))
- Update power level default for public rooms. ([\#16907](https://github.com/element-hq/synapse/issues/16907))
- Improve event validation. ([\#16908](https://github.com/element-hq/synapse/issues/16908))
- Multi-worker-docker-container: disable log buffering. ([\#16919](https://github.com/element-hq/synapse/issues/16919))
- Refactor state delta calculation in `/sync` handler. ([\#16929](https://github.com/element-hq/synapse/issues/16929))
- Clarify docs for some room state functions. ([\#16950](https://github.com/element-hq/synapse/issues/16950))
- Specify IP subnets in canonical form. ([\#16953](https://github.com/element-hq/synapse/issues/16953))
- As done for SAML mapping provider, let's pass the module API to the OIDC one so the mapper can do more logic in its code. ([\#16974](https://github.com/element-hq/synapse/issues/16974))
- Allow containers building on top of Synapse's Complement container is use the included PostgreSQL cluster. ([\#16985](https://github.com/element-hq/synapse/issues/16985))
- Raise poetry-core version cap to 1.9.0. ([\#16986](https://github.com/element-hq/synapse/issues/16986))
- Patch the db conn pool sooner in tests. ([\#17017](https://github.com/element-hq/synapse/issues/17017))

* Bump anyhow from 1.0.80 to 1.0.81. ([\#17009](https://github.com/element-hq/synapse/issues/17009))
* Bump black from 23.10.1 to 24.2.0. ([\#16936](https://github.com/element-hq/synapse/issues/16936))
* Bump cryptography from 41.0.7 to 42.0.5. ([\#16958](https://github.com/element-hq/synapse/issues/16958))
* Bump dawidd6/action-download-artifact from 3.1.1 to 3.1.2. ([\#16960](https://github.com/element-hq/synapse/issues/16960))
* Bump dawidd6/action-download-artifact from 3.1.2 to 3.1.4. ([\#17008](https://github.com/element-hq/synapse/issues/17008))
* Bump jinja2 from 3.1.2 to 3.1.3. ([\#17005](https://github.com/element-hq/synapse/issues/17005))
* Bump log from 0.4.20 to 0.4.21. ([\#16977](https://github.com/element-hq/synapse/issues/16977))
* Bump mypy from 1.5.1 to 1.8.0. ([\#16901](https://github.com/element-hq/synapse/issues/16901))
* Bump netaddr from 0.9.0 to 1.2.1. ([\#17006](https://github.com/element-hq/synapse/issues/17006))
* Bump pydantic from 2.6.0 to 2.6.4. ([\#17004](https://github.com/element-hq/synapse/issues/17004))
* Bump pyo3 from 0.20.2 to 0.20.3. ([\#16962](https://github.com/element-hq/synapse/issues/16962))
* Bump ruff from 0.1.14 to 0.3.2. ([\#16994](https://github.com/element-hq/synapse/issues/16994))
* Bump serde from 1.0.196 to 1.0.197. ([\#16963](https://github.com/element-hq/synapse/issues/16963))
* Bump serde_json from 1.0.113 to 1.0.114. ([\#16961](https://github.com/element-hq/synapse/issues/16961))
* Bump types-jsonschema from 4.21.0.20240118 to 4.21.0.20240311. ([\#17007](https://github.com/element-hq/synapse/issues/17007))
* Bump types-psycopg2 from 2.9.21.16 to 2.9.21.20240311. ([\#16995](https://github.com/element-hq/synapse/issues/16995))
* Bump types-pyopenssl from 23.3.0.0 to 24.0.0.20240311. ([\#17003](https://github.com/element-hq/synapse/issues/17003))
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