Merge branch '307-wrong-date' into 'develop'

Resolve "import date is always "a few seconds ago" on /manage/library/files"

Closes #307

See merge request funkwhale/funkwhale!273

api/funkwhale_api/manage/serializers.py

@@ -55,6 +55,7 @@ class ManageTrackFileSerializer(serializers.ModelSerializer):
             "track",
             "duration",
             "mimetype",
+            "creation_date",
             "bitrate",
             "size",
             "path",

changes/changelog.d/307.bugfix

@@ -0,0 +1 @@
+Expose track files date in manage API (#307)