clan-lib: Remove injected "op_key" argument from all functions and do it over the threadcontext instead. Remove double threading in http server

pkgs/clan-app/clan_app/api/middleware/argument_parsing.py

@@ -21,18 +21,12 @@ class ArgumentParsingMiddleware(Middleware):
             # Convert dictionary arguments to dataclass instances
             reconciled_arguments = {}
             for k, v in context.request.args.items():
-                if k == "op_key":
-                    continue
-
                 # Get the expected argument type from the API
                 arg_class = self.api.get_method_argtype(context.request.method_name, k)
 
                 # Convert dictionary to dataclass instance
                 reconciled_arguments[k] = from_dict(arg_class, v)
 
-            # Add op_key to arguments
-            reconciled_arguments["op_key"] = context.request.op_key
-
             # Create a new request with reconciled arguments
 
             updated_request = BackendRequest(