fix: 去掉ping骚扰+注入datetime防日期幻觉

1. cron_health_monitor/verify_reassess_pipeline: bridge检测从发ping改为TCP端口检测
2. xmpp_agent_core: call_hermes注入当前时间防止LLM日期幻觉
   [当前时间: 2026-07-07 15:32 Tuesday]
3. 修复import datetime缺失

scripts/cron_health_monitor.py

@@ -155,19 +155,21 @@ def main():
                 alerts.append(f"⏰ {j['name']}({j['id'][:8]}) {reason}")
                 state[key] = {"last_alerted": datetime.now().timestamp()}
 
-    # ── 检查3：XMPP bridge是否在线 ──
+    # ── 检查3：XMPP bridge是否在线（TCP端口检测，不发消息到Dad） ─
     bridge_key = "bridge_down"
     try:
-        req = Request(XMPP_BRIDGE, data=b'{"to":"hmo@yoin.fun","body":"ping","type":"chat"}',
-                      headers={"Content-Type":"application/json"})
-        resp = urlopen(req, timeout=3)
-        ok = json.loads(resp.read()).get("ok") == True
-        if not ok and is_new_alert(bridge_key, state):
-            alerts.append("🔴 XMPP bridge异常")
+        import socket
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.settimeout(3)
+        result = sock.connect_ex(("127.0.0.1", 5805))
+        sock.close()
+        bridge_ok = (result == 0)
+        if not bridge_ok and is_new_alert(bridge_key, state):
+            alerts.append("🔴 XMPP bridge(5805)端口无响应")
             state[bridge_key] = {"last_alerted": datetime.now().timestamp()}
     except Exception as e:
         if is_new_alert(bridge_key, state):
-            alerts.append(f"🔴 XMPP bridge不可达: {e}")
+            alerts.append(f"🔴 XMPP bridge检测失败: {e}")
             state[bridge_key] = {"last_alerted": datetime.now().timestamp()}
 
     # ── 检查4：price_monitor数据新鲜度（直接查DB，不依赖job记录）─

scripts/verify_reassess_pipeline.py

@@ -132,16 +132,18 @@ def run():
         checks.append({"check":"strategies","status":"fail","detail":str(e)})
         ok = False
 
-    # 3. XMPP bridge 是否在线
+    # 3. XMPP bridge 是否在线（TCP端口检测，不发消息到Dad）
     try:
-        req = Request(XMPP_BRIDGE, data=b'{"to":"hmo@yoin.fun","body":"ping","type":"chat"}',
-                      headers={"Content-Type":"application/json"})
-        resp = urlopen(req, timeout=3)
-        bridge_ok = json.loads(resp.read()).get("ok") == True
+        import socket
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.settimeout(3)
+        result = sock.connect_ex(("127.0.0.1", 5805))
+        sock.close()
+        bridge_ok = (result == 0)
         if not bridge_ok:
             ok = False
-            alerts.append("XMPP bridge异常")
-        checks.append({"check":"xmpp_bridge","status":"ok" if bridge_ok else "fail","detail":"在线" if bridge_ok else "异常"})
+            alerts.append("XMPP bridge(5805)端口无响应")
+        checks.append({"check":"xmpp_bridge","status":"ok" if bridge_ok else "fail","detail":"在线" if bridge_ok else "端口无响应"})
     except Exception as e:
         checks.append({"check":"xmpp_bridge","status":"fail","detail":str(e)})
         ok = False