fix(FN-4739): coerce sqlite delete changes count to number

Fusion-Task-Id: FN-4739
Fusion-Task-Lineage: fc120dfa-d1b2-4065-9595-d0bc6304d2af

packages/core/src/chat-store.ts

@@ -1036,7 +1036,7 @@ export class ChatStore extends EventEmitter<ChatStoreEvents> {
     }
 
     const deleted = this.db.prepare("DELETE FROM chat_room_messages WHERE roomId = ?").run(roomId);
-    const deletedCount = deleted.changes;
+    const deletedCount = Number(deleted.changes);
     if (deletedCount <= 0) {
       return 0;
     }