Stop lowercasing query keys

We use the middleware that lowercases all query keys, so there's
no need to explicitly do so in the dependency.

src/vocutouts/dependencies.py

@@ -66,7 +66,7 @@ async def get_params_dependency(
 ) -> list[UWSJobParameter]:
     """Parse GET parameters into job parameters for a cutout."""
     return [
-        UWSJobParameter(parameter_id=k.lower(), value=v)
+        UWSJobParameter(parameter_id=k, value=v)
         for k, v in request.query_params.items()
         if k in {"id", "pos", "circle", "polygon"}
     ]