系统业务任务插件化迁移：下沉7项非刚需任务并接入平滑迁移

- 系统任务保留刚需三项：登录巡检、消息计数入库、媒体补偿处理；移除新闻/Epic/排行/PDF/秀人维护等业务型系统任务定义\n- 新增 daily_news、epic_free、daily_ranking、sehuatang_push 四个插件，将原系统业务任务改为插件可调度动作\n- 扩展 xiuren_image 插件调度动作，新增秀人下载、绅士R15下载、图片缓存更新三项维护任务\n- 新增系统任务到插件任务的幂等迁移逻辑：按旧 job_key 映射到插件 action，同步 trigger_type/trigger_config/enabled，并通过 payload 标记防止反复覆盖\n- 在 Robot 启动流程中接入迁移执行与重载，并清理已迁移的历史系统任务记录，避免后台双份维护\n- 扩展插件调度数据库操作：支持按 plugin_name + action_key 精确查询，便于迁移与对账

plugins/xiuren_image/main.py

@@ -3,12 +3,15 @@ from pathlib import Path
 from loguru import logger
 import os
 import base64
+import asyncio
 from typing import Dict, Any, List, Optional, Tuple
 
 from db.connection import DBConnectionManager
 from base.plugin_common.message_plugin_interface import MessagePluginInterface
 from base.plugin_common.plugin_interface import PluginStatus
 from plugins.xiuren_image.images_cache import ImageCacheManager
+from plugins.xiuren_image.meitu_dl import meitu_dowload_pub_pic
+from plugins.xiuren_image.shenshi_r15 import run_daily_job
 from utils.decorator.plugin_decorators import plugin_stats_decorator
 from utils.decorator.rate_limit_decorator import group_feature_rate_limit
 from utils.revoke.message_auto_revoke import MessageAutoRevoke
@@ -234,11 +237,96 @@ class XiurenImagePlugin(MessagePluginInterface):
                 "target_config": {},
                 "payload": {"max_per_group": 1},
                 "default_enabled": False,
+            },
+            {
+                "action_key": "resource_xiuren_download",
+                "name": "秀人资源下载",
+                "description": "执行秀人资源下载维护任务",
+                "trigger_type": "at_times",
+                "trigger_config": {"time_list": ["01:30"]},
+                "target_scope": "all_enabled_groups",
+                "target_config": {},
+                "payload": {},
+                "default_enabled": True,
+            },
+            {
+                "action_key": "resource_shenshi_r15_download",
+                "name": "绅士R15资源下载",
+                "description": "执行绅士R15资源下载维护任务",
+                "trigger_type": "at_times",
+                "trigger_config": {"time_list": ["02:30"]},
+                "target_scope": "all_enabled_groups",
+                "target_config": {},
+                "payload": {},
+                "default_enabled": True,
+            },
+            {
+                "action_key": "resource_update_image_cache",
+                "name": "图片缓存更新",
+                "description": "扫描并更新图片缓存",
+                "trigger_type": "at_times",
+                "trigger_config": {"time_list": ["05:00"]},
+                "target_scope": "all_enabled_groups",
+                "target_config": {},
+                "payload": {},
+                "default_enabled": True,
             }
         ]
 
     async def run_scheduled_action(self, action_key: str, context: Dict[str, Any]) -> Dict[str, Any]:
         """执行插件定时动作。"""
+        if action_key == "resource_xiuren_download":
+            try:
+                # 历史逻辑为同步下载任务，这里放到线程池执行，避免阻塞调度主循环。
+                await asyncio.to_thread(meitu_dowload_pub_pic)
+                return {
+                    "success": True,
+                    "summary": "秀人资源下载任务执行完成",
+                    "detail": {},
+                }
+            except Exception as e:
+                return {
+                    "success": False,
+                    "summary": f"秀人资源下载失败: {e}",
+                    "detail": {"error": str(e)},
+                }
+
+        if action_key == "resource_shenshi_r15_download":
+            try:
+                await asyncio.to_thread(run_daily_job)
+                return {
+                    "success": True,
+                    "summary": "绅士R15资源下载任务执行完成",
+                    "detail": {},
+                }
+            except Exception as e:
+                return {
+                    "success": False,
+                    "summary": f"绅士R15资源下载失败: {e}",
+                    "detail": {"error": str(e)},
+                }
+
+        if action_key == "resource_update_image_cache":
+            try:
+                if not self.image_cache_manager:
+                    return {
+                        "success": False,
+                        "summary": "缓存管理器未初始化",
+                        "detail": {},
+                    }
+                await self.image_cache_manager.update_image_cache()
+                return {
+                    "success": True,
+                    "summary": "图片缓存更新完成",
+                    "detail": {"image_folder": self.image_folder},
+                }
+            except Exception as e:
+                return {
+                    "success": False,
+                    "summary": f"图片缓存更新失败: {e}",
+                    "detail": {"error": str(e)},
+                }
+
         if action_key != "daily_push":
             return {
                 "success": False,