Use __config__ not model_config with create_model for pydatic 2.11 compatibility

src/labthings_fastapi/utilities/introspection.py

@@ -84,7 +84,7 @@
     if remove_first_positional_arg:
         name, parameter = next(iter((parameters.items())))  # get the first parameter
         if parameter.kind in (Parameter.KEYWORD_ONLY, Parameter.VAR_KEYWORD):
             raise ValueError("Can't remove first positional argument: there is none.")
         del parameters[name]
 
     # Raise errors if positional-only or variable positional args are present
@@ -94,7 +94,7 @@
             "which is not supported."
         )
     if any(p.kind == Parameter.POSITIONAL_ONLY for p in parameters.values()):
         raise TypeError(
             f"{func.__name__} has positional-only arguments which are not supported."
         )
 
@@ -117,7 +117,7 @@
         fields[name] = (p_type, default)
     model = create_model(  # type: ignore[call-overload]
         f"{func.__name__}_input",
-        model_config=ConfigDict(extra="allow" if takes_v_kwargs else "forbid"),
+        __config__=ConfigDict(extra="allow" if takes_v_kwargs else "forbid"),
         **fields,
     )
     # If there are no fields, we use a RootModel to allow none as well as {}