🐛 Fix CodeLens route matching and nested router discovery

[savannahostrowski]

This PR fixes a grab bag of bugs related to CodeLen route matching and nested router discovery:

• CodeLens now appears for paths like f"{settings.API_V1_STR}/apps/{app.id}/tokens"
• Routers imported with aliases (from .tokens import router as tokens_router) are now discovered correctly
• Query strings in test paths no longer cause incorrect route matching
• Routers that include other routers (router.include_router(child_router)) now have their nested routes discovered
• Fixed import resolution incorrectly looking for files instead of returning the module containing the variable