fix(automation): expose durable history degradation

apps/api/src/api/v1/auto_repair.py

@@ -17,11 +17,13 @@ from fastapi import APIRouter, HTTPException, Query
 from pydantic import BaseModel, Field
 
 from src.core.csrf import CSRFToken  # Phase 20: CSRF Protection
-
 from src.services.auto_repair_service import (
     get_auto_repair_service,
 )
-from src.services.incident_service import get_incident_service
+from src.services.incident_service import (
+    IncidentDurableReadError,
+    get_incident_service,
+)
 
 router = APIRouter(prefix="/auto-repair", tags=["Auto Repair"])
 
@@ -251,6 +253,12 @@ class RepairHistoryResponse(BaseModel):
 @router.get("/history", response_model=RepairHistoryResponse)
 async def get_repair_history(
     limit: int = Query(20, ge=1, le=100),
+    project_id: str = Query(
+        "awoooi",
+        min_length=1,
+        max_length=64,
+        description="租戶 ID；legacy repair history 預設綁定 awoooi。",
+    ),
 ) -> RepairHistoryResponse:
     """
     取得修復歷史記錄。
@@ -259,7 +267,9 @@ async def get_repair_history(
     """
     try:
         incident_service = get_incident_service()
-        all_incidents = await incident_service.get_active_incidents()
+        all_incidents = await incident_service.get_active_incidents(
+            project_id=project_id,
+        )
 
         items: list[RepairHistoryItem] = []
         for incident in all_incidents:
@@ -307,6 +317,23 @@ async def get_repair_history(
 
         return RepairHistoryResponse(count=len(items), items=items)
 
-    except Exception:
-        # 任何錯誤都回傳空列表，不中斷前端
-        return RepairHistoryResponse(count=0, items=[])
+    except IncidentDurableReadError as exc:
+        raise HTTPException(
+            status_code=503,
+            detail={
+                "status": "degraded",
+                "reason_code": str(exc),
+                "source_of_truth": "postgresql",
+                "redis_fallback_used": False,
+            },
+        ) from exc
+    except Exception as exc:
+        raise HTTPException(
+            status_code=503,
+            detail={
+                "status": "degraded",
+                "reason_code": "repair_history_readback_failed",
+                "source_of_truth": "postgresql",
+                "redis_fallback_used": False,
+            },
+        ) from exc