fix(security): complete security and delivery compliance remediation

backend/app/tasks/alert_tasks.py

@@ -1,5 +1,4 @@
 """告警相关 Celery 任务"""
-import traceback
 from datetime import datetime
 from sqlalchemy import func, case
 from app.core.celery_app import celery_app
@@ -77,6 +76,6 @@ def check_school_offline_alerts():
         send_wechat_markdown(content)
         return {"alerted": True, "schools": len(rows)}
     except Exception as e:
-        return {"alerted": False, "error": str(e), "traceback": traceback.format_exc()}
+        return {"alerted": False, "error": "告警任务失败", "error_type": type(e).__name__}
     finally:
         db.close()

backend/app/tasks/audit_tasks.py

@@ -1,5 +1,4 @@
 """审计日志 Celery 任务"""
-import traceback
 from app.core.celery_app import celery_app
 from app.core.database import SessionLocal
 
@@ -57,6 +56,6 @@ def cleanup_audit_logs_task():
         deleted = cleanup_old_logs(db)
         return {'success': True, 'deleted': deleted}
     except Exception as e:
-        return {'success': False, 'error': str(e), 'traceback': traceback.format_exc()}
+        return {'success': False, 'error': '审计日志任务失败', 'error_type': type(e).__name__}
     finally:
         db.close()

backend/app/tasks/check_tasks.py

@@ -1,6 +1,5 @@
 """状态检查任务"""
 import time
-import traceback
 import redis as redis_lib
 from datetime import datetime, timedelta
 from sqlalchemy import func, case
@@ -86,13 +85,15 @@ def check_all_devices(self):
                 errors.append({
                     'olt_id': olt.id,
                     'olt_name': olt.location or olt.ip_address,
-                    'error': str(e)
+                    'error': 'OLT 状态检查失败',
+                    'error_type': type(e).__name__,
                 })
                 results.append({
                     'olt_id': olt.id,
                     'olt_name': olt.location or olt.ip_address,
                     'success': False,
-                    'error': str(e)
+                    'error': 'OLT 状态检查失败',
+                    'error_type': type(e).__name__,
                 })
 
         self.update_state(state='PROGRESS', meta={'current': total, 'total': total, 'status': '检查完成'})
@@ -118,8 +119,8 @@ def check_all_devices(self):
     except Exception as e:
         return {
             'success': False,
-            'error': str(e),
-            'traceback': traceback.format_exc()
+            'error': '设备状态检查任务失败',
+            'error_type': type(e).__name__,
         }
     finally:
         # 任务完成后记录时间、清除运行标记
@@ -181,7 +182,7 @@ def aggregate_daily_snapshot():
         return {'success': True, 'date': date_str, 'total': snapshot.total, 'online': snapshot.online}
     except Exception as e:
         db.rollback()
-        return {'success': False, 'error': str(e), 'traceback': traceback.format_exc()}
+        return {'success': False, 'error': '设备状态检查任务失败', 'error_type': type(e).__name__}
     finally:
         db.close()