Close OSS self-host gaps: in-repo API docs, legal notes, and packaging.

Add MIT license and docs/api, strip SaaS status/admin remnants from robots and footer, align env/compose/README with payment-free product truth.

Co-authored-by: Cursor <cursoragent@cursor.com>

components/ApiKeySettings.tsx

@@ -58,7 +58,8 @@ export function ApiKeySettings({ initialStatus, initialRateLimit }: Props) {
   return (
     <div className="space-y-4">
       <p className="text-sm text-gray-400">
-        Use the REST API to upload files and create video jobs programmatically.
+        Use the REST API to upload files and create video jobs programmatically. There are no
+        billing endpoints in this self-hosted edition.
       </p>
       <p className="text-xs text-gray-500">
         Rate limit: {initialRateLimit.limit} requests per {initialRateLimit.windowSeconds} seconds.