Task #1678: 修复_init_db()确保新表包含reply_status和fail_count字段

monitor.py

@@ -297,14 +297,16 @@ class MessageHistory:
         conn = sqlite3.connect(self.db_path, check_same_thread=False)
         conn.execute("PRAGMA journal_mode=WAL")
         
-        # 1. 用户消息原文表
+        # 1. 用户消息原文表（含回复状态和失败计数）
         conn.execute("""
             CREATE TABLE IF NOT EXISTS user_messages (
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
                 platform TEXT NOT NULL,
                 content TEXT NOT NULL,
                 content_hash TEXT NOT NULL,
-                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                reply_status INTEGER DEFAULT 1,
+                fail_count INTEGER DEFAULT 0
             )
         """)
         conn.execute("""