Address PR #1369 review: pre-commit fixes + filter naming + resolve_me type

- Apply pyupgrade/black/isort fixes (Optional → | None) and drop the
  resulting unused 'Optional'/'Union' imports.
- Rename 'info: str' → 'name: str' on django-filters method signatures
  in filters.py. The parameter receives the filter field name; the
  'info' name was misleading copy-paste from GraphQL resolver
  signatures (where 'info' is graphene.ResolveInfo).
- Widen UserQueryMixin.resolve_me return type from User to
  User | AnonymousUser. The query has no @login_required, so
  info.context.user can be AnonymousUser at runtime.

Author: JSv4

config/graphql/document_queries.py

@@ -5,7 +5,7 @@
 from __future__ import annotations
 
 import logging
-from typing import Any, Optional
+from typing import Any
 
 import graphene
 from django.conf import settings
@@ -61,7 +61,7 @@ def resolve_documents(
 
     def resolve_document(
         self, info: graphene.ResolveInfo, **kwargs: Any
-    ) -> Optional[Document]:
+    ) -> Document | None:
         document_id = kwargs.get("id")
         if not document_id:
             return None
@@ -331,7 +331,7 @@ def resolve_ingestion_sources(
     @graphql_ratelimit_dynamic(get_rate=get_user_tier_rate("READ_LIGHT"))
     def resolve_ingestion_source(
         self, info: graphene.ResolveInfo, id: str, **kwargs: Any
-    ) -> Optional[IngestionSource]:
+    ) -> IngestionSource | None:
         try:
             type_name, pk = from_global_id(id)
             if not pk or type_name != INGESTION_SOURCE_GLOBAL_ID_TYPE: