fix(lint): match base class parameter name execution_context

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ImTotem

src/bcsd_api/graphql/schema.py

@@ -57,7 +57,7 @@ class Mutation:
 
 
 class _Schema(strawberry.Schema):
-    def process_errors(self, errors: List[GraphQLError], ctx: ExecutionContext | None = None) -> None:
+    def process_errors(self, errors: List[GraphQLError], execution_context: ExecutionContext | None = None) -> None:
         for err in errors:
             if isinstance(err.original_error, AppException):
                 continue