Summary

Routes that use path converters (e.g. {param:path}) are not detected as path parameters when the parameter is declared implicitly
(without Path()), because get_path_param_names() returns the raw token including the converter suffix.

This causes the parameter to be treated as a query parameter and the request to fail.

Changes Made

• Strip converter suffixes in get_path_param_names() so {param:path} is recognized as param.
• Add a regression test that verifies an implicit param: str path parameter works with the path converter.

Why it matters

This aligns implicit parameters with explicit Path() behavior and restores correct routing for path-converter syntax.

Testing

• Added a focused test in tests/test_starlette_urlconvertors.py.