fix: 补提交校验、停用检查、入群过滤与按完成时刻清理

internal/app/message/recover.go

@@ -86,7 +86,15 @@ WHERE d.state = 'pending' AND d.pushed_conn IS NULL
 			cutoff := nowMs - int64(a.lim.RecordRetentionDays)*24*3600*1000
 			if _, err := tx.Exec(`
 DELETE FROM messages WHERE seq IN (
-  SELECT seq FROM messages WHERE state = 'completed' AND created_at < ? LIMIT 5000
+  SELECT seq FROM (
+    SELECT m.seq FROM messages m
+    WHERE m.state = 'completed'
+      AND COALESCE(
+        (SELECT MAX(d.updated_at) FROM deliveries d WHERE d.seq = m.seq),
+        m.send_at
+      ) < ?
+    LIMIT 5000
+  )
 )`, cutoff); err != nil {
 				return err
 			}