Get the code ready for ty

[adamtheturtle]

Note

Strengthens typing for routing decorators using Protocol/ParamSpec and preserves method names, without changing behavior.

• Typing/Decorators:
  • Introduce _RouteMethod Protocol with ParamSpec to ensure routed callables expose __name__ and typed __call__ returning _ResponseType in mock_web_query_api.py and mock_web_services_api.py.
  • Update route decorator signatures to be generic and return the same typed callable (Callable[[_RouteMethod[_P]], _RouteMethod[_P]]); adjust inner decorator annotations accordingly.
  • Minor import updates to include ParamSpec, Protocol, and runtime_checkable; no functional logic changes.

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