Handcrafts SQL queries a little more to reduce the query count and/or the amount of returned data (#6489)

src/documents/checks.py

@@ -16,9 +16,13 @@ def changed_password_check(app_configs, **kwargs):
     from paperless.db import GnuPG
 
     try:
-        encrypted_doc = Document.objects.filter(
-            storage_type=Document.STORAGE_TYPE_GPG,
-        ).first()
+        encrypted_doc = (
+            Document.objects.filter(
+                storage_type=Document.STORAGE_TYPE_GPG,
+            )
+            .only("pk", "storage_type")
+            .first()
+        )
     except (OperationalError, ProgrammingError, FieldError):
         return []  # No documents table yet