Synapse 1.83.0rc1 (2023-05-02)

==============================

Features
--------

- Experimental support to recursively provide relations per [MSC3981](https://github.com/matrix-org/matrix-spec-proposals/pull/3981). ([\#15315](https://github.com/matrix-org/synapse/issues/15315))
- Experimental support for [MSC3970](https://github.com/matrix-org/matrix-spec-proposals/pull/3970): Scope transaction IDs to devices. ([\#15318](https://github.com/matrix-org/synapse/issues/15318))
- Add an [admin API endpoint](https://matrix-org.github.io/synapse/v1.83/admin_api/experimental_features.html) to support per-user feature flags. ([\#15344](https://github.com/matrix-org/synapse/issues/15344))
- Add a module API to send an HTTP push notification. ([\#15387](https://github.com/matrix-org/synapse/issues/15387))
- Add an [admin API endpoint](https://matrix-org.github.io/synapse/v1.83/admin_api/statistics.html#get-largest-rooms-by-size-in-database) to query the largest rooms by disk space used in the database. ([\#15482](https://github.com/matrix-org/synapse/issues/15482))

Bugfixes
--------

- Disable push rule evaluation for rooms excluded from sync. ([\#15361](https://github.com/matrix-org/synapse/issues/15361))
- Fix a long-standing bug where cached server key results which were directly fetched would not be properly re-used. ([\#15417](https://github.com/matrix-org/synapse/issues/15417))
- Fix a bug introduced in Synapse 1.73.0 where some experimental push rules were returned by default. ([\#15494](https://github.com/matrix-org/synapse/issues/15494))

Improved Documentation
----------------------

- Add Nginx loadbalancing example with sticky mxid for workers. ([\#15411](https://github.com/matrix-org/synapse/issues/15411))
- Update outdated development docs that mention restrictions in versions of SQLite that we no longer support. ([\#15498](https://github.com/matrix-org/synapse/issues/15498))

Internal Changes
----------------

- Speedup tests by caching HomeServerConfig instances. ([\#15284](https://github.com/matrix-org/synapse/issues/15284))
- Add denormalised event stream ordering column to membership state tables for future use. Contributed by Nick @ Beeper (@fizzadar). ([\#15356](https://github.com/matrix-org/synapse/issues/15356))
- Always use multi-user device resync replication endpoints. ([\#15418](https://github.com/matrix-org/synapse/issues/15418))
- Add column `full_user_id` to tables `profiles` and `user_filters`. ([\#15458](https://github.com/matrix-org/synapse/issues/15458))
- Update support for [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983) to allow always returning fallback-keys in a `/keys/claim` request. ([\#15462](https://github.com/matrix-org/synapse/issues/15462))
- Improve type hints. ([\#15465](https://github.com/matrix-org/synapse/issues/15465), [\#15496](https://github.com/matrix-org/synapse/issues/15496), [\#15497](https://github.com/matrix-org/synapse/issues/15497))
- Support claiming more than one OTK at a time. ([\#15468](https://github.com/matrix-org/synapse/issues/15468))
- Bump types-pyyaml from 6.0.12.8 to 6.0.12.9. ([\#15471](https://github.com/matrix-org/synapse/issues/15471))
- Bump pyasn1-modules from 0.2.8 to 0.3.0. ([\#15473](https://github.com/matrix-org/synapse/issues/15473))
- Bump cryptography from 40.0.1 to 40.0.2. ([\#15474](https://github.com/matrix-org/synapse/issues/15474))
- Bump types-netaddr from 0.8.0.7 to 0.8.0.8. ([\#15475](https://github.com/matrix-org/synapse/issues/15475))
- Bump types-jsonschema from 4.17.0.6 to 4.17.0.7. ([\#15476](https://github.com/matrix-org/synapse/issues/15476))
- Ask bug reporters to provide logs as text. ([\#15479](https://github.com/matrix-org/synapse/issues/15479))
- Add a Nix flake for use as a development environment. ([\#15495](https://github.com/matrix-org/synapse/issues/15495))
- Bump anyhow from 1.0.70 to 1.0.71. ([\#15507](https://github.com/matrix-org/synapse/issues/15507))
- Bump types-pillow from 9.4.0.19 to 9.5.0.2. ([\#15508](https://github.com/matrix-org/synapse/issues/15508))
- Bump packaging from 23.0 to 23.1. ([\#15510](https://github.com/matrix-org/synapse/issues/15510))
- Bump types-requests from 2.28.11.16 to 2.29.0.0. ([\#15511](https://github.com/matrix-org/synapse/issues/15511))
- Bump setuptools-rust from 1.5.2 to 1.6.0. ([\#15512](https://github.com/matrix-org/synapse/issues/15512))
- Update the check_schema_delta script to account for when the schema version has been bumped locally. ([\#15466](https://github.com/matrix-org/synapse/issues/15466))
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