feat: add new tools for subscription management and scheduling

- Introduced DeleteSubscribeTool for managing subscriptions.
- Added QuerySchedulersTool and RunSchedulerTool for enhanced scheduling capabilities.
- Updated __all__ exports in init.py and factory.py to include new tools.

app/agent/tools/impl/query_schedulers.py

@@ -0,0 +1,51 @@
+"""查询定时服务工具"""
+
+import json
+from typing import Type
+
+from pydantic import BaseModel, Field
+
+from app.agent.tools.base import MoviePilotTool
+from app.log import logger
+from app.scheduler import Scheduler
+
+
+class QuerySchedulersInput(BaseModel):
+    """查询定时服务工具的输入参数模型"""
+    explanation: str = Field(..., description="Clear explanation of why this tool is being used in the current context")
+
+
+class QuerySchedulersTool(MoviePilotTool):
+    name: str = "query_schedulers"
+    description: str = "Query scheduled tasks and list all available scheduler jobs. Shows job status, next run time, and provider information."
+    args_schema: Type[BaseModel] = QuerySchedulersInput
+
+    async def run(self, **kwargs) -> str:
+        logger.info(f"执行工具: {self.name}")
+        try:
+            scheduler = Scheduler()
+            schedulers = scheduler.list()
+            if schedulers:
+                # 转换为字典列表以便JSON序列化
+                schedulers_list = []
+                for s in schedulers:
+                    schedulers_list.append({
+                        "id": s.id,
+                        "name": s.name,
+                        "provider": s.provider,
+                        "status": s.status,
+                        "next_run": s.next_run
+                    })
+                result_json = json.dumps(schedulers_list, ensure_ascii=False, indent=2)
+                # 限制最多30条结果
+                total_count = len(schedulers_list)
+                if total_count > 30:
+                    limited_schedulers = schedulers_list[:30]
+                    limited_json = json.dumps(limited_schedulers, ensure_ascii=False, indent=2)
+                    return f"注意：查询结果共找到 {total_count} 条，为节省上下文空间，仅显示前 30 条结果。\n\n{limited_json}"
+                return result_json
+            return "未找到定时服务"
+        except Exception as e:
+            logger.error(f"查询定时服务失败: {e}", exc_info=True)
+            return f"查询定时服务时发生错误: {str(e)}"
+