Migrate albums and pictures to their own tables

sas/schemas.py

@@ -69,7 +69,7 @@ class PictureFilterSchema(FilterSchema):
 class PictureSchema(ModelSchema):
     class Meta:
         model = Picture
-        fields = ["id", "name", "date", "size", "is_moderated", "asked_for_removal"]
+        fields = ["id", "name", "created_at", "is_moderated", "asked_for_removal"]
 
     owner: UserProfileSchema
     sas_url: str