feat: Upgrade to Python 3.12 (#4675)

Co-authored-by: Hayden <64056131+hay-kot@users.noreply.github.com>

mealie/repos/repository_generic.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import random
 from collections.abc import Iterable
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from math import ceil
 from typing import Any, Generic, TypeVar
 
@@ -70,7 +70,7 @@ class RepositoryGeneric(Generic[Schema, Model]):
         return self._household_id
 
     def _random_seed(self) -> str:
-        return str(datetime.now(tz=timezone.utc))
+        return str(datetime.now(tz=UTC))
 
     def _log_exception(self, e: Exception) -> None:
         self.logger.error(f"Error processing query for Repo model={self.model.__name__} schema={self.schema.__name__}")