fix(feishu): keep source.message_id in step with the batched event id

Text and media batching advance the coalesced MessageEvent.message_id to
the newest message but left source.message_id at the first one, so after
a batch the reply anchor and the event id disagreed. Advance both together
at the two enqueue sites.

plugins/platforms/feishu/adapter.py

@@ -2592,6 +2592,7 @@ class FeishuAdapter(BasePlatformAdapter):
         existing.timestamp = event.timestamp
         if event.message_id:
             existing.message_id = event.message_id
+            existing.source.message_id = event.message_id
         self._schedule_media_batch_flush(key)
 
     def _schedule_media_batch_flush(self, key: str) -> None:
@@ -2850,6 +2851,7 @@ class FeishuAdapter(BasePlatformAdapter):
         existing.timestamp = event.timestamp
         if event.message_id:
             existing.message_id = event.message_id
+            existing.source.message_id = event.message_id
         self._pending_text_batch_counts[key] = next_count
         self._schedule_text_batch_flush(key)