Moves additional auditlog imports into protected blocks (#6638)

src/documents/serialisers.py

@@ -5,7 +5,6 @@ import zoneinfo
 from decimal import Decimal
 
 import magic
-from auditlog.context import set_actor
 from celery import states
 from django.conf import settings
 from django.contrib.auth.models import Group
@@ -28,6 +27,9 @@ from rest_framework import fields
 from rest_framework import serializers
 from rest_framework.fields import SerializerMethodField
 
+if settings.AUDIT_LOG_ENABLED:
+    from auditlog.context import set_actor
+
 from documents import bulk_edit
 from documents.data_models import DocumentSource
 from documents.models import Correspondent