fix(approval): map rejected incidents to escalated

apps/api/src/core/constants.py

@@ -37,8 +37,8 @@ REDIS_KEY_DECISION = "decision:"
 APPROVAL_TO_INCIDENT_STATUS = {
     "pending": "investigating",
     "approved": "resolved",
-    "rejected": "rejected",
-    "expired": "expired",
+    "rejected": "escalated",
+    "expired": "escalated",
 }
 
 # Incident 狀態 → 是否活躍

apps/api/src/services/incident_approval_service.py

@@ -35,6 +35,7 @@ from src.core.constants import (
 from src.core.unit_of_work import UnitOfWork
 from src.db.models import ApprovalRecord, IncidentRecord
 from src.models.approval import ApprovalRequestCreate, ApprovalStatus
+from src.models.incident import IncidentStatus
 
 if TYPE_CHECKING:
     from redis.asyncio import Redis
@@ -341,12 +342,14 @@ class IncidentApprovalService:
             incident = result.scalar_one_or_none()
 
             if incident:
-                new_incident_status = APPROVAL_TO_INCIDENT_STATUS.get(
-                    new_status.value if hasattr(new_status, "value") else new_status,
-                    "investigating",
+                new_incident_status = IncidentStatus(
+                    APPROVAL_TO_INCIDENT_STATUS.get(
+                        new_status.value if hasattr(new_status, "value") else new_status,
+                        "investigating",
+                    )
                 )
                 incident.status = new_incident_status
-                if new_incident_status == "resolved":
+                if new_incident_status == IncidentStatus.RESOLVED:
                     incident.resolved_at = datetime.now(UTC)
 
                 logger.info(