Why

This PR addresses the following problem/context:

• Fixes OpenAPI generation failures caused by dependency aliases being typed incorrectly.
• Prevents OpenAPI customization logic from crashing when app.routes contains non-route router objects.

How

Implementation summary - the following was changed/added/removed:

• Updated shared dependency aliases in core/dependencies.py to use TypeAlias instead of type[...].
• Updated the OpenAPI route lookup in core/app.py to safely access path and methods using getattr().

Notes

Any special considerations, workarounds, or follow-up work to note?

• This should resolve the _IncludedRouter attribute error during /openapi.json generation.
• Verify by running the app locally and confirming /docs and /openapi.json both load successfully.