fix(api): _persist_incident 新增顯式 commit + 追蹤日誌

根因: DB 變更未被 commit，導致 Incident 狀態更新不持久化

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

apps/api/src/services/proposal_service.py

@@ -493,6 +493,13 @@ class ProposalService:
                     record.status = incident.status.value
                     record.proposal_ids = [str(pid) for pid in incident.proposal_ids]
                     record.updated_at = incident.updated_at
+                    # 顯式 commit 確保變更持久化
+                    await db.commit()
+                    logger.info(
+                        "db_incident_updated",
+                        incident_id=incident.incident_id,
+                        new_status=incident.status.value,
+                    )
 
         except Exception as e:
             logger.warning(
@@ -524,6 +531,12 @@ class ProposalService:
         Returns:
             是否更新成功
         """
+        logger.info(
+            "resolve_incident_starting",
+            incident_id=incident_id,
+            approval_id=approval_id,
+        )
+
         try:
             incident = await self._load_incident(incident_id)
             if not incident:
@@ -534,6 +547,12 @@ class ProposalService:
                 )
                 return False
 
+            logger.info(
+                "resolve_incident_loaded",
+                incident_id=incident_id,
+                current_status=incident.status.value,
+            )
+
             # 更新狀態
             old_status = incident.status
             incident.status = IncidentStatus.RESOLVED