fix: graceful shutdown for hosted servers

[cristipufu]

Summary

This PR adds robust shutdown handling to the CLI runtime by catching interrupts, cancelling tasks, and ensuring cleanup runs before exit.

[Copilot]

Pull Request Overview

This PR adds robust shutdown handling to the CLI runtime by catching interrupts, cancelling tasks, and ensuring cleanup runs before exit.

• Wraps execute logic in nested try/except/finally to handle KeyboardInterrupt, cancel tasks, and return None on user abort.
• Moves cleanup (self.cleanup) and trace_provider.shutdown into the outer finally block.
• Refactors _keep_alive loop to use asyncio.wait_for for cancellable sleep and logs cancellation.

Comments suppressed due to low confidence (3)

src/uipath_mcp/_cli/_runtime/_runtime.py:104

• New graceful shutdown paths (interrupt handling, task cancellation, and cleanup) are introduced here but lack corresponding unit or integration tests. Consider adding tests that simulate KeyboardInterrupt and verify that tasks are cancelled and cleanup is called.

                try:

src/uipath_mcp/_cli/_runtime/_runtime.py:460

• [nitpick] Defining on_keep_alive_response inside the loop causes a new function to be created on each iteration. Consider moving it outside the loop to reduce overhead and simplify the loop body.

                    async def on_keep_alive_response(

src/uipath_mcp/_cli/_runtime/_runtime.py:131

• [nitpick] There are two separate KeyboardInterrupt handlers with different log messages. Consolidating them into one catch block would simplify the control flow and ensure a single consistent message.

        except KeyboardInterrupt:

[Copilot]

The inner except KeyboardInterrupt catches the interrupt and sets the cancellation event but does not re-raise or return, causing the flow to continue to output_result and potentially return an incomplete result. Consider re-raising the exception after setting the event or returning early to ensure the outer handler is invoked.