Adding gnommoeditor in the current version

backend/migrations/016_add_asset_parent_id.cjs

@@ -0,0 +1,20 @@
+// Allows an asset to declare that it is a processed derivative of another asset.
+// Example lineage: raw .mov → chroma-keyed .mp4 (parent_id → raw asset)
+// A raw asset has parent_id = NULL.
+// Multiple processed versions can share the same parent_id.
+
+exports.up = (pgm) => {
+  pgm.addColumn('shared_assets', {
+    parent_id: {
+      type: 'integer',
+      references: 'shared_assets',
+      onDelete: 'SET NULL',
+    },
+  });
+  pgm.createIndex('shared_assets', 'parent_id', { name: 'idx_shared_assets_parent' });
+};
+
+exports.down = (pgm) => {
+  pgm.dropIndex('shared_assets', 'parent_id', { name: 'idx_shared_assets_parent' });
+  pgm.dropColumn('shared_assets', 'parent_id');
+};