fix: 审核引擎优化 + 执行结果结构化展示

后端审核规则修复:
- Redis SEC-001: SET/DEL等常规命令不再误报AUTH要求，改为仅对管理级命令WARNING
- Redis SEC-003: 降级为INFO，排除已由CMD-001拦截的FLUSHDB/FLUSHALL
- Redis key提取: 排除CONFIG/ACL等管理命令，不再把子命令参数误认为key名
- MySQL SEC-006: 新增GRANT ALL/REVOKE ALL全局权限拦截
- MySQL SEC-007: 新增LOAD DATA/LOAD XML拦截
- MySQL SEC-008: 新增SLEEP()/BENCHMARK()时间盲注拦截
- MySQL SEC-009: 新增INTO OUTFILE/DUMPFILE文件写入拦截

前端执行结果结构化:
- TicketDetailPage执行结果从原始JSON改为结构化展示
- 解析JSON展示: 状态徽章+影响行数+耗时+验证状态
- Errors/Warnings逐条渲染: 红色错误框+黄色警告框+具体消息
- 删除废弃的executeStats/renderExecuteStats

其他: 审核规则6分组/慢查询移除/查询数据重命名/AuditLogs修复
测试: 1040 passed, TSC零错误

backend/app/services/db_connector.py

@@ -5,6 +5,7 @@ Replaces mock aiomysql calls with actual driver connections.
 """
 import asyncio
 import time
+import asyncio
 import sqlite3
 from typing import Optional, List, Dict, Any, Tuple
 
@@ -61,12 +62,68 @@ class DBConnector:
                 return await DBConnector._test_postgres(instance, start)
             elif instance.db_type == "sqlite":
                 return await DBConnector._test_sqlite(instance, start)
+            elif instance.db_type == "redis":
+                return await DBConnector._test_redis(instance, start)
+            elif instance.db_type == "mongodb":
+                return await DBConnector._test_mongodb(instance, start)
             else:
                 return ConnectionResult(False, f"暂不支持 {instance.db_type} 类型数据源")
         except Exception as e:
             elapsed = int((time.time() - start) * 1000)
             return ConnectionResult(False, f"连接失败: {str(e)}", latency_ms=elapsed)
 
+
+    @staticmethod
+    async def _test_redis(instance: 'Instance', start: float) -> ConnectionResult:
+        """Test Redis connectivity using synchronous redis client in thread."""
+        try:
+            import redis as redis_lib
+
+            def _connect():
+                client = redis_lib.Redis(
+                    host=instance.host,
+                    port=instance.port,
+                    password=instance.password if instance.password and instance.password != "default" else None,
+                    db=0,
+                    socket_connect_timeout=5,
+                    socket_timeout=5,
+                )
+                info = client.info("server")
+                version = info.get("redis_version", "unknown")
+                client.close()
+                return version
+
+            version = await asyncio.to_thread(_connect)
+            elapsed = int((time.time() - start) * 1000)
+            return ConnectionResult(True, f"Redis {version} 连接成功", version=version, latency_ms=elapsed)
+        except Exception as e:
+            elapsed = int((time.time() - start) * 1000)
+            return ConnectionResult(False, f"Redis 连接失败: {str(e)}", latency_ms=elapsed)
+
+    @staticmethod
+    async def _test_mongodb(instance: 'Instance', start: float) -> ConnectionResult:
+        """Test MongoDB connectivity using pymongo in thread."""
+        try:
+            from pymongo import MongoClient
+
+            def _connect():
+                if instance.username and instance.username != "default":
+                    uri = f"mongodb://{instance.username}:{instance.password}@{instance.host}:{instance.port}/"
+                else:
+                    uri = f"mongodb://{instance.host}:{instance.port}/"
+                client = MongoClient(uri, serverSelectionTimeoutMS=5000, connectTimeoutMS=5000)
+                info = client.server_info()
+                version = info.get("version", "unknown")
+                client.close()
+                return version
+
+            version = await asyncio.to_thread(_connect)
+            elapsed = int((time.time() - start) * 1000)
+            return ConnectionResult(True, f"MongoDB {version} 连接成功", version=version, latency_ms=elapsed)
+        except Exception as e:
+            elapsed = int((time.time() - start) * 1000)
+            return ConnectionResult(False, f"MongoDB 连接失败: {str(e)}", latency_ms=elapsed)
+
     @staticmethod
     async def execute_query(
         instance: Instance, database: Optional[str], sql: str, user_id: int