Add SQL migration to populate DataLayer.edit_status from Map.edit_status

umap/migrations/0014_migrate_edit_status.py

@@ -0,0 +1,16 @@
+# Generated by Django 4.2.2 on 2023-09-12 09:24
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("umap", "0013_datalayer_edit_status"),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            "UPDATE umap_datalayer SET edit_status=("
+            "SELECT edit_status FROM umap_map WHERE umap_map.id=umap_datalayer.map_id);"
+        )
+    ]