fix: Improve MCP server robustness and debugging

- Refactor  for more reliable project root detection, particularly when running within integrated environments like Cursor IDE. Includes deriving root from script path and avoiding fallback to '/'.
- Enhance error handling in :
    - Add detailed debug information (paths searched, CWD, etc.) to the error message when  is not found in the provided project root.
    - Improve clarity of error messages and potential solutions.
- Add verbose logging in  to trace session object content and the finally resolved project root path, aiding in debugging path-related issues.
- Add default values for  and  to the example  environment configuration.

mcp-server/src/tools/add-task.js

@@ -43,7 +43,7 @@ export function registerAddTaskTool(server) {
         const result = await addTaskDirect({
           projectRoot: rootFolder, // Pass the resolved root
           ...args
-        }, log);
+        }, log, { reportProgress, mcpLog: log, session});
         
         return handleApiResult(result, log);
       } catch (error) {