(ddp-removal): this should move to `/v1/chat.syncMessages` so reconnect

[github-actions]

also reconciles edits/deletions made while offline, but that endpoint queries
by _updatedAt (+ trash collection) and is currently too slow for this path.
Evaluate/optimize the query before migrating; for now keep the DDP method.

📝 Found in apps/meteor/client/views/root/hooks/useLoadMissedMessages.ts#L24

Commit: 6033e93

Task: ARCH-2182

[coderabbitai]

🔗 Related PRs

#40659 - chore: migrate DDP callers to REST endpoints (used methods with REST replacement) [merged]
#40913 - regression: revert thread messages endpoint usage [merged]
#40954 - chore: reduce room opening latency in message history load [merged]
#40956 - fix: thread panel not scrolling to bottom after sending a reply [merged]
#40981 - chore: undo loadMissedMessages deprecation from #40711 [merged]

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/jira ARCH-2167