fix(alerts): correct telegram execution truth

apps/api/src/services/alert_rule_engine.py

@@ -298,6 +298,12 @@ def _matches(rule: dict, alertname: str, alert_type: str, message: str, instance
     if alertnames and alertname in alertnames:
         return True
 
+    # 2026-05-31 ogt + Codex: 有明確 alertname 的規則不得只靠寬鬆 message
+    # keyword 命中，否則 HostPreviousBootStorageErrorsDetected 這類主機 storage
+    # 告警會誤配到 minio_disk_high。
+    if alertnames and alertname and alertname != "custom":
+        return False
+
     # alert_type 部分匹配
     for kw in match.get("alert_type", []):
         if kw.lower() in alert_type.lower():