fix(tests): 首席架構師審查修復 - 測試套件 + DI 強化 (96/100 OUTSTANDING)

P1 測試修復:
- test_smart_router.py: 更新至當前 API (IntentResult + DIAGNOSE/CONFIG 規範化)
- test_auto_repair_service.py: 注入 _no_cooldown fixture 隔離 Redis 依賴
- test_global_repair_cooldown.py: 加 @pytest.mark.integration 標記

P2 架構改進:
- AutoRepairService: 新增 cooldown_checker DI 參數 (Callable | None)
- global_repair_cooldown: get_redis() 移入 try-except 防止未捕獲 RuntimeError

P3 配置:
- pyproject.toml: 登記 integration pytest marker

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/services/auto_repair_service.py

@@ -23,6 +23,7 @@ Phase 8: 自動化層實作
 """
 
 from dataclasses import dataclass
+from collections.abc import Callable
 from typing import Protocol
 
 import structlog
@@ -137,8 +138,11 @@ class AutoRepairService:
     def __init__(
         self,
         playbook_service: IPlaybookService | None = None,
+        cooldown_checker: Callable | None = None,
     ):
+        # 2026-04-01 ogt: 注入 cooldown_checker 支援測試隔離 (DI 原則)
         self._playbook_service = playbook_service or get_playbook_service()
+        self._cooldown_checker = cooldown_checker or check_global_repair_cooldown
 
     async def evaluate_auto_repair(
         self,
@@ -160,7 +164,7 @@ class AutoRepairService:
         )
 
         # 0. 全域熔斷檢查（ADR-039 最優先）
-        can_repair, cooldown_reason = await check_global_repair_cooldown(
+        can_repair, cooldown_reason = await self._cooldown_checker(
             incident_id=incident.incident_id,
             affected_services=incident.affected_services or [],
         )

apps/api/src/services/global_repair_cooldown.py

@@ -65,9 +65,8 @@ async def check_global_repair_cooldown(
         (can_repair: bool, reason: str)
     """
     affected_services = affected_services or []
-    redis = get_redis()
 
-    # === 硬禁令：有狀態服務黑名單 ===
+    # === 硬禁令：有狀態服務黑名單 (純邏輯，無需 Redis) ===
     for service in affected_services:
         service_lower = service.lower()
         for blacklisted in STATEFUL_SERVICE_BLACKLIST:
@@ -82,7 +81,9 @@ async def check_global_repair_cooldown(
                 return False, reason
 
     # === 全域冷卻期：Redis 計數 ===
+    # 2026-04-01 ogt: 將 get_redis() 移入 try-except，防止 Redis 未初始化時拋出未捕獲例外
     try:
+        redis = get_redis()
         count_raw = await redis.get(GLOBAL_COOLDOWN_KEY)
         current_count = int(count_raw) if count_raw else 0