Much base work started

db/migrate/20251029120452_update_video_assets_from_architecture.rb

@@ -0,0 +1,11 @@
+class UpdateVideoAssetsFromArchitecture < ActiveRecord::Migration[8.1]
+  def change
+    change_table :video_assets do |t|
+      # Make asset_type required
+      t.change_null :asset_type, false
+    end
+
+    # Add indexes as specified in architecture
+    add_index :video_assets, [:video_id, :asset_type], unique: true
+  end
+end