[studio] prefix assets

apps/rooms/migrations/0026_unity_asset_kind.sql

@@ -0,0 +1,26 @@
+-- `unity_asset` gains a `kind`: Rec Room Studio builds store a `main` bundle (the scene the
+-- client loads) and, optionally, a `stripped` editor-only bundle per target, and both are
+-- rows here now that the studio worker writes this table instead of its own
+-- `studio_unity_asset_file` (dropped by the studio migration 0002). The studio rows map
+-- platform → target (windows 0, android 2), the R2 key → `filename` and the base64
+-- SHA-256 → `hash`.
+--
+-- Generated from packages/domain/src/unity-assets-db.ts (UNITY_ASSET_SCHEMA_DDL) — keep in
+-- sync. `kind` joins the primary key, which SQLite cannot alter in place, so the rows are
+-- copied into a new table and KEPT: every existing row is a main bundle.
+
+CREATE TABLE unity_asset_new (
+  unity_asset_id TEXT NOT NULL,
+  target INTEGER NOT NULL,
+  version INTEGER NOT NULL,
+  kind TEXT NOT NULL DEFAULT 'main',
+  filename TEXT NOT NULL,
+  hash TEXT NOT NULL,
+  PRIMARY KEY (unity_asset_id, target, version, kind)
+);
+
+INSERT INTO unity_asset_new (unity_asset_id, target, version, kind, filename, hash)
+  SELECT unity_asset_id, target, version, 'main', filename, hash FROM unity_asset;
+
+DROP TABLE unity_asset;
+ALTER TABLE unity_asset_new RENAME TO unity_asset;