Fix typing and linting errors

greg/management/commands/notification_publisher.py

@@ -49,7 +49,6 @@ def create_cloud_event_payload(n: Notification) -> str:
     and source, i.e no.local.greg.person.add
     """
 
-    object_type = camel_to_snake(n.object_type)
     content: dict[str, Union[str, dict[str, str]]] = {
         "id": str(n.id),
         "source": f"greg:{settings.INSTANCE_NAME}:{settings.ENVIRONMENT}",

greg/management/commands/task_scheduler.py

@@ -10,6 +10,7 @@ from greg.schedule import ExpiringRolesNotification
 logging.config.dictConfig(settings.LOGGING)
 logger = logging.getLogger(__name__)
 
+
 class Command(BaseCommand):
     """
     This command starts a basic task runner. All tasks it is supposed to

greg/signals.py

 import time
 import logging
-from typing import Dict
+from typing import Dict, Union
 
 from django.db import models
 from django.dispatch import receiver
@@ -165,8 +165,8 @@ def m2m_changed_notification_callback(
             )
 
 
-def _create_metadata(instance) -> Dict:
-    meta = {}
+def _create_metadata(instance) -> Dict[str, Union[int, str]]:
+    meta: Dict[str, Union[int, str]] = {}
     if isinstance(instance, Person):
         meta["person_id"] = instance.id
     elif isinstance(instance, Role):