MCP temperaray exception handling fix

[Granine]

feat(rt_mcp): Improve MCP error handling, OAuth support, and documentation

Major improvements to MCP system reliability and developer experience:

🐛 Bug Fixes:

• Fixed critical bug where exceptions in background thread weren't propagated to main thread
• Added _setup_exception field to MCPServer to capture and re-raise exceptions with context
• Enhanced close() method to safely handle None values for _loop and _shutdown_event
• Fixed race condition where _ready_event was set even on failure

⚡ Error Handling Improvements:

• Added setup_timeout parameter (default 30s) to all connection methods
• Enhanced error messages with helpful troubleshooting context:
  • FileNotFoundError: Suggests checking PATH and command spelling
  • ConnectionError: Provides network/auth troubleshooting steps
  • TimeoutError: Includes command/URL in error message
• Added proper timeout handling to _ready_event.wait()

✅ Test Suite Additions (22 tests, 100% passing in <1s):

• test_error_handling.py: 7 tests for error propagation and cleanup
  • Invalid commands and exception handling
  • Error message context validation
  • Thread cleanup verification
  • Close() method edge cases
• test_oauth.py: 15 tests for OAuth integration
  • OAuth parameter handling
  • Token storage operations
  • Metadata creation and validation
  • Full integration tests
• All tests use mocks (no external network calls)
• Zero thread leaks after errors

🔧 Testing Infrastructure:

• Created test_mcp_debug.py for MCP diagnostics (8 tests)
• Created test_deepwiki_mcp.py for DeepWiki integration testing
• Created check_deepwiki_params.py for tool parameter inspection
• All test files use proper fixtures and mocking

📖 Additional Documentation:

• TEST_SUITE_ADDITION_SUMMARY.md: Comprehensive test suite overview
• Improved code readability with better variable names and structure

This commit resolves critical stability issues, adds professional OAuth support,
and significantly improves the developer experience with better error messages
and comprehensive documentation.

[soulFood5632]

LGTM, one minor style comment

[soulFood5632]

local import that shouldn't be