[studio] beta studio (#114)

* rrs stuff

* studio service yay

* rrs whitelist

* moree studiooooooo fellowwww

* rec room studio room loading yay

* fixes yay

* fix 2 because idk  yayuh

* Update cdn.app.ts

* ccontent length fix?

* Preserve content-length and upgrade metadata

Return a real zero-filled byte array for CDN HEAD responses so the runtime preserves Content-Length while still sending no payload. In notify, re-create the Request with its original headers, set OWNER_HEADER from the validated token, and forward that Request to hub.fetch to avoid losing WebSocket upgrade metadata (which could trigger 500s in Durable Objects). These changes ensure the editor's size checks and WebSocket upgrades remain reliable.

* fix x524234

* shirt thing?

* [auth] remove grant table as we already have audit_log for now

* rename table to generic device_grant

* cleanup/lint

---------

Co-authored-by: Devin Zuczek <devin.zuczek@gmail.com>

apps/cdn/wrangler.jsonc

@@ -32,6 +32,17 @@
 		"directory": "./static",
 		"run_worker_first": true
 	},
+	// Shared `recflare` DB, read so `/unityasset/:filename` can resolve a Studio
+	// bundle's public filename to the R2 key the studio worker stored. Studio owns
+	// the migration (`apps/studio/migrations`); this binding deliberately has no
+	// migrations_dir, so deploying cdn does not try to create those tables.
+	"d1_databases": [
+		{
+			"binding": "DB",
+			"database_name": "recflare",
+			"database_id": "local"
+		}
+	],
 	// CDN binaries (signature blobs + room build data) are stored as R2 objects
 	// and streamed back by key. Keys are prefixed `sigs/` and `room/`.
 	"r2_buckets": [