fix(aiops): route backup failures rule-first

apps/api/src/api/v1/webhooks.py

@@ -101,13 +101,13 @@ def _should_bypass_alertmanager_llm(
     rule_response: dict | None,
     alert_category: str,
 ) -> bool:
-    """Host 類告警命中 YAML NO_ACTION 時，直接走人工排查卡片。"""
+    """主機/備份類告警命中 YAML NO_ACTION 時，直接走人工排查卡片。"""
     return (
         rule_response is not None
         and rule_response.get("suggested_action") == "NO_ACTION"
         and not str(rule_response.get("kubectl_command", "")).strip()
         and rule_response.get("rule_id", "") not in ("generic_fallback", "")
-        and alert_category == "host_resource"
+        and alert_category in {"host_resource", "backup_failure"}
     )
 
 
@@ -115,9 +115,9 @@ def _should_use_alertmanager_rule_first(
     rule_response: dict | None,
     alert_category: str,
 ) -> bool:
-    """Host 類告警命中權威 YAML 規則時，避免再被 LLM 污染成 K8s 動作。"""
+    """主機/備份類告警命中權威 YAML 規則時，避免再被 LLM 污染成 K8s 動作。"""
 
-    if not rule_response or alert_category != "host_resource":
+    if not rule_response or alert_category not in {"host_resource", "backup_failure"}:
         return False
     if rule_response.get("rule_id", "") in ("generic_fallback", ""):
         return False
@@ -1363,7 +1363,7 @@ async def _process_new_alert_background(
                 alertname=alertname,
                 rule_id=rule_response.get("rule_id", ""),
                 alert_category=alert_category,
-                reason="host_resource YAML 權威規則命中，跳過 LLM 避免產生錯誤 K8s 動作",
+                reason="host/backup YAML 權威規則命中，跳過 LLM 避免產生錯誤 K8s 動作",
             )
             risk_mapping = {
                 "low": RiskLevel.LOW,