Update to auditlog v3

Pipfile.lock

@@ -479,12 +479,12 @@
         },
         "django-auditlog": {
             "hashes": [
-                "sha256:7bc2c87e4aff62dec9785d1b2359a2b27148f8c286f8a52b9114fc7876c5a9f7",
-                "sha256:b9d3acebb64f3f2785157efe3f2f802e0929aafc579d85bbfb9827db4adab532"
+                "sha256:92db1cf4a51ceca5c26b3ff46997d9e3305a02da1bd435e2efb5b8b6d300ce1f",
+                "sha256:9de49f80a4911135d136017123cd73461f869b4947eec14d5e76db4b88182f3f"
             ],
             "index": "pypi",
-            "markers": "python_version >= '3.7'",
-            "version": "==2.3.0"
+            "markers": "python_version >= '3.8'",
+            "version": "==3.0.0"
         },
         "django-celery-results": {
             "hashes": [

src/documents/tests/test_file_handling.py

@@ -4,6 +4,7 @@ import tempfile
 from pathlib import Path
 from unittest import mock
 
+from auditlog.context import disable_auditlog
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.db import DatabaseError
@@ -143,7 +144,9 @@ class TestFileHandling(DirectoriesMixin, FileSystemAssertsMixin, TestCase):
         # Set a correspondent and save the document
         document.correspondent = Correspondent.objects.get_or_create(name="test")[0]
 
-        with mock.patch("documents.signals.handlers.Document.objects.filter") as m:
+        with mock.patch(
+            "documents.signals.handlers.Document.objects.filter",
+        ) as m, disable_auditlog():
             m.side_effect = DatabaseError()
             document.save()
 
@@ -557,6 +560,7 @@ class TestFileHandling(DirectoriesMixin, FileSystemAssertsMixin, TestCase):
     @override_settings(FILENAME_FORMAT="{title}")
     @mock.patch("documents.signals.handlers.Document.objects.filter")
     def test_no_update_without_change(self, m):
+        with disable_auditlog():
             doc = Document.objects.create(
                 title="document",
                 filename="document.pdf",

src/documents/views.py

@@ -753,7 +753,7 @@ class DocumentViewSet(
                     "id": entry.id,
                     "timestamp": entry.timestamp,
                     "action": entry.get_action_display(),
-                    "changes": json.loads(entry.changes),
+                    "changes": entry.changes,
                     "actor": (
                         {"id": entry.actor.id, "username": entry.actor.username}
                         if entry.actor