[sharing] Add bulk scrobble share management

vrobbler/apps/profiles/migrations/0038_userprofile_media_type_visibility.py

@@ -0,0 +1,20 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("profiles", "0037_alter_userprofile_default_scrobble_visibility"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="userprofile",
+            name="media_type_visibility",
+            field=models.JSONField(
+                blank=True,
+                default=dict,
+                help_text='Per-media-type visibility overrides, e.g. {"Video": "public", "Track": "private"}',
+            ),
+        ),
+    ]