fix(ai): isolate heavy Ollama workloads from GCP alert lane

apps/api/src/services/decision_fusion_adapter.py

@@ -26,7 +26,7 @@ from __future__ import annotations
 
 import asyncio
 import re
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any, Literal
 
 import httpx
@@ -125,7 +125,7 @@ class DecisionFusionAdapter:
     # Public API
     # =========================================================================
 
-    async def fuse_decision(self, event: "AiGovernanceEvent") -> FusedDecision:
+    async def fuse_decision(self, event: AiGovernanceEvent) -> FusedDecision:
         """三維融合：LLM × Playbook × MCP → FusedDecision。
 
         三個維度並行評估（asyncio.gather），任一失敗靜默降為 0.5。
@@ -226,7 +226,7 @@ class DecisionFusionAdapter:
     # =========================================================================
 
     async def _score_llm(
-        self, event: "AiGovernanceEvent"
+        self, event: AiGovernanceEvent
     ) -> tuple[float, str, dict[str, Any]]:
         """Ollama LLM 推理：治理事件情境 → 建議動作 + 信心度。
 
@@ -254,7 +254,9 @@ class DecisionFusionAdapter:
             "只輸出 CONFIDENCE 和 ACTION 兩行，不要其他解釋。"
         )
 
-        ollama_url = getattr(self._settings, "OLLAMA_URL", "http://192.168.0.111:11434")  # 2026-05-04 ogt: ADR-110 修正 — 111 primary
+        from src.services.ollama_endpoint_resolver import resolve_ollama_endpoint
+
+        ollama_url = resolve_ollama_endpoint("deep_rca")
 
         try:
             async with httpx.AsyncClient(
@@ -320,7 +322,7 @@ class DecisionFusionAdapter:
     # =========================================================================
 
     async def _score_playbook(
-        self, event: "AiGovernanceEvent"
+        self, event: AiGovernanceEvent
     ) -> tuple[float, str | None, float | None]:
         """Playbook 相似度比對 → 取最高 trust_score。
 
@@ -373,7 +375,7 @@ class DecisionFusionAdapter:
     # =========================================================================
 
     async def _score_mcp(
-        self, event: "AiGovernanceEvent"
+        self, event: AiGovernanceEvent
     ) -> tuple[float, dict[str, Any]]:
         """Prometheus 情報採集 → MCP 感官品質分數。