fix(aiops): 補齊 Elephant Alpha trigger context

部署閘門修復：補 autonomous engine 的 confidence/max decision 初始化與 _build_trigger_context，避免 scheduler autonomous monitoring 持續噴 AttributeError。

services/elephant_alpha_autonomous_engine.py

@@ -43,6 +43,8 @@ SSH_COMMAND_TIMEOUT = int(os.getenv("ELEPHANT_ALPHA_SSH_COMMAND_TIMEOUT", "60"))
 
 CACHE_DB_PATH = os.getenv("ELEPHANT_ALPHA_CACHE_DB", ":memory:")
 ESCALATION_COOLDOWN_MIN = int(os.getenv("ELEPHANT_ALPHA_ESCALATION_COOLDOWN_MIN", "30"))
+CONFIDENCE_THRESHOLD = float(os.getenv("ELEPHANT_ALPHA_CONFIDENCE_THRESHOLD", "0.7"))
+MAX_AUTONOMOUS_DECISIONS_PER_HOUR = int(os.getenv("ELEPHANT_ALPHA_MAX_AUTONOMOUS_DECISIONS_PER_HOUR", "10"))
 
 # ---- Constants ----
 _ALLOWED_ACTION_TYPES = frozenset({
@@ -181,6 +183,8 @@ class ElephantAlphaAutonomousEngine:
         self._init_ssh_key_once()
         self.decision_history: List[DecisionOutcome] = []
         self.triggers: List[AutonomousTrigger] = []
+        self.confidence_threshold = CONFIDENCE_THRESHOLD
+        self.max_autonomous_decisions_per_hour = MAX_AUTONOMOUS_DECISIONS_PER_HOUR
         self._initialize_triggers()
         self._circuit_breaker_state = {"failures": 0, "last_failure": None}
         self._cb_threshold = 5
@@ -469,6 +473,48 @@ class ElephantAlphaAutonomousEngine:
             session.close()
 
     # ---- Decision execution ----
+    async def _build_trigger_context(self, trigger: AutonomousTrigger) -> Dict[str, Any]:
+        """Build the business context passed to Elephant Alpha."""
+        context = {
+            "trigger_type": trigger.trigger_type,
+            "trigger_label": _zh_trigger(trigger.trigger_type),
+            "conditions": trigger.conditions,
+            "threshold": trigger.threshold,
+            "enabled": trigger.enabled,
+            "last_triggered": trigger.last_triggered.isoformat() if trigger.last_triggered else None,
+            "generated_at": datetime.now().isoformat(),
+            "system_state": {
+                "action_queue_size": self._safe_metric(self._get_action_queue_size, default=0),
+                "system_load_pct": self._safe_metric(self._get_system_load_percentage, default=0.0),
+                "circuit_breaker_failures": self._circuit_breaker_state.get("failures", 0),
+                "confidence_threshold": self.confidence_threshold,
+                "max_autonomous_decisions_per_hour": self.max_autonomous_decisions_per_hour,
+            },
+            "objectives": [
+                "維持 MOMO 商品監控與業績分析服務可用性",
+                "降低重複告警與人工排查成本",
+                "在低風險範圍內產生可稽核的自動化行動建議",
+            ],
+            "constraints": [
+                "不得使用 docker compose down 或 --remove-orphans",
+                "不得操作 momo-db 容器生命週期",
+                "P1/P2 行動需保留 audit trail 與 Telegram 稽核通知",
+            ],
+        }
+
+        if trigger.temp_error_msg:
+            context["error_context"] = trigger.temp_error_msg[:4000]
+        if trigger.temp_target_file:
+            context["target_file"] = trigger.temp_target_file
+        return context
+
+    @staticmethod
+    def _safe_metric(fn, default):
+        try:
+            return fn()
+        except Exception:
+            return default
+
     async def _execute_autonomous_decision(self, trigger: AutonomousTrigger) -> None:
         context = await self._build_trigger_context(trigger)
         try: