chore: update changeset to reflect full scope of sliding sync memory PR

Author: Just-Insane

.changeset/fix-sliding-sync-memory.md

@@ -2,4 +2,4 @@
 default: patch
 ---
 
-Stop the sliding sync polling loop on client dispose and free inactive room event timelines from memory.
+Tighten sliding sync memory management: stop the polling loop on client dispose, persist then prune large room timelines when leaving a room, remove adaptive timeline-limit logic, and auto-unsubscribe when the local user leaves or is banned from a room.