refactor: remove redundant str() conversion

Remove unnecessary str() conversion on request.url.path as it already
returns a string type in Starlette.

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: seapagan

app/middleware/logging_middleware.py

@@ -40,7 +40,7 @@ async def dispatch(
         duration = time.time() - start_time
 
         # Build full path including query string if present
-        path = str(request.url.path)
+        path = request.url.path
         if request.url.query:
             path = f"{path}?{request.url.query}"