fix(GAP-D5): 日度報告 DB 欄位修正

兩處 import/查詢錯誤修復（統帥 E2E 預覽發現）:

1. _collect_repair_stats: ApprovalRequestRecord 不存在
   → 改用 IncidentRecord + outcome JSON 路徑查詢 execution_success

2. _collect_playbook_count: PlaybookRecord 不存在
   → 改用 playbook_service.list_playbooks() (Redis 儲存)

修復前：修復成功率永遠 0.0%、活躍 Playbook 永遠 0
修復後：報告數字反映真實 DB/Redis 狀態

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

apps/api/src/services/report_generation_service.py

@@ -218,24 +218,30 @@ class ReportGenerationService:
             }
 
     async def _collect_repair_stats(self, since: datetime) -> dict:
-        """收集自動修復統計（approval_requests 表）"""
-        from sqlalchemy import func, select
+        """
+        收集自動修復統計（IncidentRecord.outcome JSON）
+
+        2026-04-14 Claude Sonnet 4.6 修復 — 原本引用不存在的 ApprovalRequestRecord，
+        實際 execution_success 儲存在 IncidentRecord.outcome JSON 欄位。
+        """
+        from sqlalchemy import func, select, text
 
         from src.db.base import get_db_context
-        from src.db.models import ApprovalRequestRecord
+        from src.db.models import IncidentRecord
 
         async with get_db_context() as db:
+            # PostgreSQL JSON 路徑查詢：outcome->>'execution_success'
             success = await db.scalar(
-                select(func.count()).select_from(ApprovalRequestRecord).where(
-                    ApprovalRequestRecord.created_at >= since,
-                    ApprovalRequestRecord.execution_success.is_(True),
+                select(func.count()).select_from(IncidentRecord).where(
+                    IncidentRecord.created_at >= since,
+                    text("outcome->>'execution_success' = 'true'"),
                 )
             ) or 0
 
             failed = await db.scalar(
-                select(func.count()).select_from(ApprovalRequestRecord).where(
-                    ApprovalRequestRecord.created_at >= since,
-                    ApprovalRequestRecord.execution_success.is_(False),
+                select(func.count()).select_from(IncidentRecord).where(
+                    IncidentRecord.created_at >= since,
+                    text("outcome->>'execution_success' = 'false'"),
                 )
             ) or 0
 
@@ -257,17 +263,21 @@ class ReportGenerationService:
             return int(count)
 
     async def _collect_playbook_count(self) -> int:
-        """收集活躍 Playbook 數量"""
-        from sqlalchemy import func, select
+        """
+        收集活躍 Playbook 數量
 
-        from src.db.base import get_db_context
-        from src.db.models import PlaybookRecord
+        2026-04-14 Claude Sonnet 4.6 修復 — Playbook 儲存在 Redis 非 PostgreSQL，
+        改用 playbook_service.list_playbooks() 讀 Redis。
+        """
+        from src.services.playbook_service import get_playbook_service
 
-        async with get_db_context() as db:
-            count = await db.scalar(
-                select(func.count()).select_from(PlaybookRecord)
-            ) or 0
-            return int(count)
+        try:
+            svc = get_playbook_service()
+            playbooks, total = await svc.list_playbooks(limit=1000)
+            return int(total or len(playbooks))
+        except Exception as e:
+            logger.warning("daily_kpi_playbook_count_failed", error=str(e))
+            return 0
 
     def format_daily_report(self, kpi: DailyKpi) -> str:
         """