Out of sync error versioning

[pcapriotti]

https://wearezeta.atlassian.net/browse/WPB-21877

Checklist

• Add a new entry in an appropriate subdirectory of changelog.d
• Read and follow the PR guidelines

[Copilot]

Pull request overview

This PR introduces versioning for the MLS "out of sync" error functionality to ensure backward compatibility with older API versions. The out-of-sync check is disabled for API versions below V13, preventing breaking changes for clients using older API versions.

Key changes:

• Adds a new EnableOutOfSyncCheck type to control whether out-of-sync checks are performed
• Introduces APIVersion combinator to pass API version information to handlers
• Updates MLS message and commit bundle handlers to conditionally apply out-of-sync checks based on API version
• Extends federation API to include enableOutOfSyncCheck field for cross-backend compatibility

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
libs/wire-api/src/Wire/API/MLS/OutOfSync.hs	New module defining EnableOutOfSyncCheck data type with default value DisableOutOfSyncCheck
libs/wire-api/src/Wire/API/VersionInfo.hs	Adds APIVersion servant combinator and getVersionHeader helper function for extracting version from requests
libs/wire-api/src/Wire/API/Routes/SpecialiseToVersion.hs	Extends version specialization to support APIVersion combinator
libs/wire-api/src/Wire/API/Routes/Public/Galley/MLS.hs	Adds APIVersion to MLS message and commit bundle API routes
libs/wire-api-federation/src/Wire/API/Federation/API/Galley.hs	Adds optional enableOutOfSyncCheck field to MLSMessageSendRequest for federation support
services/galley/src/Galley/API/MLS/Message.hs	Implements version-based logic with enableOutOfSyncCheckFromVersion function and updates handlers to accept version parameter
services/galley/src/Galley/API/MLS/OutOfSync.hs	Modifies checkConversationOutOfSync to respect EnableOutOfSyncCheck input
services/galley/src/Galley/API/Federation.hs	Updates federation handlers to propagate enableOutOfSyncCheck from incoming requests using default when not provided
services/galley/test/integration/API/MLS.hs	Updates test utilities to set enableOutOfSyncCheck = Nothing for federated message send requests
services/galley/test/integration/API/MLS/Util.hs	Updates test helper to include enableOutOfSyncCheck field
integration/test/Test/Channels.hs	Adds comprehensive test coverage for version-based behavior in both local and federated scenarios
libs/wire-api/wire-api.cabal	Registers new Wire.API.MLS.OutOfSync module
changelog.d/3-bug-fixes/out-of-sync-error-versioning	Documents the bug fix for older backends

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