fix: runtime error handling

[radugheo]

This PR fixes unhandled exceptions during the session.initialize() step. Previously, only asyncio.TimeoutError was caught, causing other errors to go uncaught. As a result, the client would receive a misleading message:

❌ The server process failed to initialize. Verify environment variables are set correctly.

With this change, all initialization errors are now properly caught and handled, ensuring a more accurate error reporting.

Development Package

• Add this package as a dependency in your pyproject.toml:

[project]
dependencies = [
  # Exact version:
  "uipath-mcp==0.0.105.dev1001530156",

  # Any version from PR
  "uipath-mcp>=0.0.105.dev1001530000,<0.0.105.dev1001540000"
]

[[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
publish-url = "https://test.pypi.org/legacy/"
explicit = true

[tool.uv.sources]
uipath-mcp = { index = "testpypi" }

[Copilot]

Pull Request Overview

This PR refactors error handling in the server initialization process to improve code clarity and exception chaining. The changes simplify the initialization logic by removing the explicit success tracking flag and consolidating exception handling.

Key changes:

• Removed the initialization_successful flag in favor of simpler exception-based control flow
• Simplified exception handling from except* syntax to standard exception handling
• Added proper exception chaining with from e clause

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