fix: folder path error handling

[radugheo]

Fixes misleading error message when UIPATH_FOLDER_PATH points to a non-existent folder

Previously, when the folder path was set but invalid, the error incorrectly told users to "set the UIPATH_FOLDER_PATH environment variable", even though it was already set. Now the error includes the actual folder path and tells users to verify it's valid.

Also adds unit tests for both folder path error handling paths (missing vs not found).

[Copilot]

Pull request overview

Improves UIPATH_FOLDER_PATH validation feedback in the MCP runtime by making the “folder not found” error actionable (includes the provided path), and adds unit tests for the missing-vs-not-found paths.

Changes:

• Update runtime error detail when UIPATH_FOLDER_PATH is set but resolves to no folder key.
• Add async pytest coverage for both “missing env var” and “folder not found” cases.
• Add pytest-asyncio dev dependency and bump package version to 0.1.3.

Reviewed changes

Copilot reviewed 3 out of 6 changed files in this pull request and generated 2 comments.

File	Description
src/uipath_mcp/_cli/_runtime/_runtime.py	Updates the user-facing error detail for invalid UIPATH_FOLDER_PATH.
tests/cli/test_runtime.py	Adds async unit tests covering missing vs invalid folder path behavior.
pyproject.toml	Adds pytest-asyncio to dev deps; bumps version.
uv.lock	Locks pytest-asyncio and reflects version/dependency updates.

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[Copilot]

In these tests, runtime._run_server() will always execute the finally: await self._cleanup() path. _cleanup() calls _on_runtime_abort(), which does await self._uipath.api_client.request_async(...). Since the fixture sets rt._uipath = MagicMock(), request_async will be a plain MagicMock (not awaitable) and can raise a TypeError, masking the intended UiPathMcpRuntimeError and making the tests flaky/failing. Consider either stubbing runtime._cleanup / _on_runtime_abort in the tests, or setting runtime._uipath.api_client.request_async to an AsyncMock returning a response object with status_code/text.