refactor: add cache decorator to `get_version` to prevent redundant file reads

activate_account_project/settings/base.py

 import os
 import sys
 import tomllib
+import functools
 from datetime import timedelta
 from pathlib import Path
 
@@ -9,7 +10,7 @@ import structlog
 
 from api.versions import AVAILABLE_VERSIONS
 
-
+@functools.cache
 def get_version():
     """
     Retrieves the project's version number from pyproject.toml.