- Add a feature that allows clients to query the configured federation whitelist. Disabled by default. ([\#16848](https://github.com/element-hq/synapse/issues/16848), [\#17199](https://github.com/element-hq/synapse/issues/17199))

- Add the ability to allow numeric user IDs with a specific prefix when in the CAS flow. Contributed by Aurélien Grimpard. ([\#17098](https://github.com/element-hq/synapse/issues/17098))

- Fix bug where push rules would be empty in `/sync` for some accounts. Introduced in v1.93.0. ([\#17142](https://github.com/element-hq/synapse/issues/17142))
- Add support for optional whitespace around the Federation API's `Authorization` header's parameter commas. ([\#17145](https://github.com/element-hq/synapse/issues/17145))
- Fix bug where disabling room publication prevented public rooms being created on workers. ([\#17177](https://github.com/element-hq/synapse/issues/17177), [\#17184](https://github.com/element-hq/synapse/issues/17184))

- Document [`/v1/make_knock`](https://spec.matrix.org/v1.10/server-server-api/#get_matrixfederationv1make_knockroomiduserid) and [`/v1/send_knock/`](https://spec.matrix.org/v1.10/server-server-api/#put_matrixfederationv1send_knockroomideventid) federation endpoints as worker-compatible. ([\#17058](https://github.com/element-hq/synapse/issues/17058))
- Update User Admin API with note about prefixing OIDC external_id providers. ([\#17139](https://github.com/element-hq/synapse/issues/17139))
- Clarify the state of the created room when using the `autocreate_auto_join_room_preset` config option. ([\#17150](https://github.com/element-hq/synapse/issues/17150))
- Update the Admin FAQ with the current libjemalloc version for latest Debian stable. Additionally update the name of the "push_rules" stream in the Workers documentation. ([\#17171](https://github.com/element-hq/synapse/issues/17171))

- Add note to reflect that [MSC3886](https://github.com/matrix-org/matrix-spec-proposals/pull/3886) is closed but will remain supported for some time. ([\#17151](https://github.com/element-hq/synapse/issues/17151))
- Update dependency PyO3 to 0.21. ([\#17162](https://github.com/element-hq/synapse/issues/17162))
- Fixes linter errors found in PR #17147. ([\#17166](https://github.com/element-hq/synapse/issues/17166))
- Bump black from 24.2.0 to 24.4.2. ([\#17170](https://github.com/element-hq/synapse/issues/17170))
- Cache literal sync filter validation for performance. ([\#17186](https://github.com/element-hq/synapse/issues/17186))
- Improve performance by fixing a reactor pause. ([\#17192](https://github.com/element-hq/synapse/issues/17192))
- Route `/make_knock` and `/send_knock` federation APIs to the federation reader worker in Complement test runs. ([\#17195](https://github.com/element-hq/synapse/issues/17195))
- Prepare sync handler to be able to return different sync responses (`SyncVersion`). ([\#17200](https://github.com/element-hq/synapse/issues/17200))
- Organize the sync cache key parameter outside of the sync config (separate concerns). ([\#17201](https://github.com/element-hq/synapse/issues/17201))
- Refactor `SyncResultBuilder` assembly to its own function. ([\#17202](https://github.com/element-hq/synapse/issues/17202))
- Rename to be obvious: `joined_rooms` -> `joined_room_ids`. ([\#17203](https://github.com/element-hq/synapse/issues/17203), [\#17208](https://github.com/element-hq/synapse/issues/17208))
- Add a short pause when rate-limiting a request. ([\#17210](https://github.com/element-hq/synapse/issues/17210))

* Bump cryptography from 42.0.5 to 42.0.7. ([\#17180](https://github.com/element-hq/synapse/issues/17180))
* Bump gitpython from 3.1.41 to 3.1.43. ([\#17181](https://github.com/element-hq/synapse/issues/17181))
* Bump immutabledict from 4.1.0 to 4.2.0. ([\#17179](https://github.com/element-hq/synapse/issues/17179))
* Bump sentry-sdk from 1.40.3 to 2.1.1. ([\#17178](https://github.com/element-hq/synapse/issues/17178))
* Bump serde from 1.0.200 to 1.0.201. ([\#17183](https://github.com/element-hq/synapse/issues/17183))
* Bump serde_json from 1.0.116 to 1.0.117. ([\#17182](https://github.com/element-hq/synapse/issues/17182))
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