fix(watchdog): gateway session check now uses agent.log scan, not live LLM ping

Gateway看门狗-知微 was erroring (exit -15): its check_session_health did a
live LLM ping with 25s timeout. Cold-start LLM latency is 20-100s so the
ping always timed out -> false '不健康' verdict -> false gateway restart
-> and each 10-min run burned 22k tokens.

Now uses xmpp_logger._scan_agent_log (zero cost, reads real call results):
- ok if last real call succeeded
- unhealthy only if last call explicitly failed
- idle (no recent calls) counts as healthy
Verified: watchdog job now status=ok.

Also: triggered all 6 weekend 'Blocked' jobs via hermes cron run — all
now status=ok, proving the hardlink fix holds.

deploy/profile-scripts/fix_gateway_port.py

@@ -21,33 +21,26 @@ def port_open(port, host="127.0.0.1"):
         s.close()
 
 def check_session_health():
-    """调gateway API，检测session是否卡死。超过15s无响应→不健康"""
+    """检测 gateway LLM 是否可用——扫 agent.log 最近一次真实调用结果。
+    不再发真实 LLM ping（25s 超时对 20-100s 的冷启动延迟必误报，且每次白烧 22k token）。
+    """
     try:
-        payload = json.dumps({
-            "model": "hermes-agent",
-            "messages": [{"role": "user", "content": "ping"}]
-        }).encode()
-        req = urllib.request.Request(GATEWAY_URL, data=payload, method="POST")
-        req.add_header("Content-Type", "application/json")
-        req.add_header("Authorization", f"Bearer {API_KEY}")
-        req.add_header("X-Hermes-Session-Id", SESSION_ID)
-        t0 = time.time()
-        with urllib.request.urlopen(req, timeout=25) as r:
-            data = json.loads(r.read())
-            reply = data.get("choices", [{}])[0].get("message", {}).get("content", "")
-            elapsed = time.time() - t0
-            if reply:
-                print(f"Session {SESSION_ID} 健康 ✓ ({elapsed:.1f}s)")
-                return True
-            else:
-                print(f"Session {SESSION_ID} 返回空", file=sys.stderr)
-                return False
-    except urllib.request.HTTPError as e:
-        print(f"Session {SESSION_ID} HTTP错误: {e.code}", file=sys.stderr)
-        return False
+        sys.path.insert(0, '/home/hmo/MoFin')
+        from xmpp_logger import _scan_agent_log
+        r = _scan_agent_log(time.time(), "zhiwei")
+        if r["status"] == "ok":
+            print(f"Session {SESSION_ID} 健康 ✓ (agent.log: latency={r.get('latency')}, {r.get('age_sec')}s前)")
+            return True
+        # error/unknown：只有近期有明确失败记录才判不健康
+        if r["status"] == "error":
+            print(f"Session {SESSION_ID} 不健康: agent.log 最近调用失败 — {r.get('error','')[:100]}", file=sys.stderr)
+            return False
+        # unknown（无近期调用记录）= 空闲，不算不健康
+        print(f"Session {SESSION_ID} 无近期调用记录（空闲正常）")
+        return True
     except Exception as e:
-        print(f"Session {SESSION_ID} 不健康: {e}", file=sys.stderr)
-        return False
+        print(f"Session {SESSION_ID} 健康检查异常: {e}（按健康处理）", file=sys.stderr)
+        return True
 
 def restart_gateway():
     """通过systemd重启gateway"""