Delete events from federation_inbound_events_staging table on purge

Author: Mathieu Velten

changelog.d/12770.bugfix

@@ -0,0 +1 @@
+Delete events from federation_inbound_events_staging table when a room is purged through the admin API.

synapse/storage/databases/main/purge_events.py

@@ -417,6 +417,7 @@ def _purge_room_txn(self, txn: LoggingTransaction, room_id: str) -> List[int]:
             "room_account_data",
             "room_tags",
             "local_current_membership",
+            "federation_inbound_events_staging",
         ):
             logger.info("[purge] removing %s from %s", room_id, table)
             txn.execute("DELETE FROM %s WHERE room_id=?" % (table,), (room_id,))