Support Matrix v1.14

[reivilibre]

Checklist taken from https://spec.matrix.org/v1.14/changelog/v1.14/checklist.md

Follows: #18118 (v1.12, v1.13)

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Matrix Specification v1.14 Changelog

Git commit	https://github.com/matrix-org/matrix-spec/tree/v1.14
Release date	March 27, 2025

Client-Server API

New Endpoints

• Add POST /_matrix/client/v3/users/{userId}/report, as per MSC4260. (#2093)

Removed Endpoints

• Remove server_name parameter from /_matrix/client/v3/join/{roomIdOrAlias} and /_matrix/client/v3/knock/{roomIdOrAlias}, as per MSC4213. (#2059)

Spec Clarifications

• The POST /_matrix/client/v3/rooms/{roomId}/initialSync endpoint is no longer deprecated, as it is still used for peeking. (#2036)
• Clarify wording in the /join endpoints' summaries and descriptions. Contributed by @HarHarLinks. (#2038)
• Clarify formats of string types. (#2046)
• Fix various typos throughout the specification. (#2047, #2048, #2080, #2091)
• Document the instance_id field of Protocol Instance in the responses to GET /_matrix/client/v3/thirdparty/protocols and GET /_matrix/client/v3/thirdparty/protocol/{protocol}. (#2051)
• Applying redactions is a SHOULD for clients. (#2055)
• Clarify which rooms are returned from /hierarchy. (#2064)
• Clients can choose which history visibility options they offer to users when creating rooms. (#2072)

Server-Server API

Spec Clarifications

• Remove the origin field in PUT /send_join responses, because it was never sent in the first place. (#2050)
• Clarify that m.join_rules should be in the auth_events of an m.room.member event with a membership of knock. (#2063)
• Remove an erroneous room_id field in a few examples. (#2076)

Application Service API

No significant changes.

Identity Service API

No significant changes.

Push Gateway API

No significant changes.

Room Versions

Backwards Compatible Changes

• Update the default room version to 11, as per MSC4239. (#2105) — Room version default does not match the specification. #18530 : Change default room version to 11. implements MSC4239 #18680

Spec Clarifications

• For room versions 6 and 7, clarify in the authorization rules that m.federate must be checked and that events with rejected auth events must be rejected, for parity with all the other room versions. (#2065)
• Fix various typos throughout the specification. (#2066)
• Refactor PDU definitions to reduce duplication. (#2070)
• Clarify the maximum depth value for room versions 6, 7, 8, 9, 10, and 11. (#2114)

Appendices

Spec Clarifications

• Clarify that arbitrary unicode is allowed in user/room IDs and room aliases. (#1506)

Internal Changes/Tooling

Spec Clarifications

• Generate the changelog release info with Hugo, rather than the changelog generation script. (#2033)
• Update release steps documentation. (#2041)
• Remove unused release_date from Hugo config. (#2042)
• Clarify that v1.0 of Matrix was a release prior to the current global versioning system. (#2045)
• Fix syntax highlighting and click-to-copy buttons for code blocks by purging less CSS. (#2049)
• Fix the version of the Identity Service API when Matrix 1.0 was introduced. (#2061)
• Fix parsing of nested slices in resolve-refs and resolve-allof partials. (#2069)
• Deduplicate the definition of RoomKeysUpdateResponse. (#2073)
• Deduplicate the definitions of Invite3pid. (#2074)
• Support more locations for examples in OpenAPI definitions and JSON schemas. (#2076)
• Add link to the git commit for the unstable changelog. (#2078)

[Johennes]

• Add POST /_matrix/client/v3/users/{userId}/report, as per MSC4260. (#2093)

This happened in #18120 which landed only after the MSC and used stable prefixes directly.

[Johennes]

• Remove server_name parameter from /_matrix/client/v3/join/{roomIdOrAlias} and /_matrix/client/v3/knock/{roomIdOrAlias}, as per MSC4213. (#2059)

The replacement for server_name (via) was introduced with #17322 and stabilized with #17650. We'll need to keep server_name around for clients that don't support 1.14 yet. So I think there's nothing to do here.