feat: 重构数据存储路径并优化任务通知机制

将审计日志、会话数据和定时任务文件移动到统一的data目录下
为后台任务添加完成回调功能，优化CC任务完成后的通知流程
更新README和ROADMAP文档，标记已完成的功能项

bot/feishu.py

@@ -184,22 +184,20 @@ async def send_file(receive_id: str, receive_id_type: str, file_path: str, file_
     loop = asyncio.get_running_loop()
 
     # Step 1: Upload file → get file_key
-    with open(path, "rb") as f:
-        file_data = f.read()
-
     def _upload():
-        req = (
-            CreateFileRequest.builder()
-            .request_body(
-                CreateFileRequestBody.builder()
-                .file_type(file_type)
-                .file_name(file_name)
-                .file(file_data)
+        with open(path, "rb") as f:
+            req = (
+                CreateFileRequest.builder()
+                .request_body(
+                    CreateFileRequestBody.builder()
+                    .file_type(file_type)
+                    .file_name(file_name)
+                    .file(f)
+                    .build()
+                )
                 .build()
             )
-            .build()
-        )
-        return _client.im.v1.file.create(req)
+            return _client.im.v1.file.create(req)
 
     upload_resp = await loop.run_in_executor(None, _upload)