- Extract MockMCPTransport to features/mocks/mock_mcp_transport.py
- Use ToolRegistry type with TYPE_CHECKING in register_tools()
- Move transport config validation into __init__ via _validate_config()
Implement MCPToolAdapter to connect to external MCP servers, enumerate
tools, and register them in ToolRegistry with source="mcp". Includes
connect/reconnect/disconnect lifecycle with timeout enforcement, input
validation on invoke, capability inference, Behave/Robot/ASV tests, and
docs/reference/mcp_adapter.md.
ISSUES CLOSED: #159
aditya
