Synapse 1.108.0rc1 (2024-05-21)

Add a feature that allows clients to query the configured federation whitelist. Disabled by default. (#16848, #17199)
Add the ability to allow numeric user IDs with a specific prefix when in the CAS flow. Contributed by Aurélien Grimpard. (#17098)

Fix bug where push rules would be empty in /sync for some accounts. Introduced in v1.93.0. (#17142)
Add support for optional whitespace around the Federation API's Authorization header's parameter commas. (#17145)
Fix bug where disabling room publication prevented public rooms being created on workers. (#17177, #17184)

Document /v1/make_knock and /v1/send_knock/ federation endpoints as worker-compatible. (#17058)
Update User Admin API with note about prefixing OIDC external_id providers. (#17139)
Clarify the state of the created room when using the autocreate_auto_join_room_preset config option. (#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)

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

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