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.

app/api/v1/route.ts

@@ -8,6 +8,9 @@ export async function GET() {
     authentication: "Authorization: Bearer <api_key>",
     requirements: ["YouTube account connected"],
     rateLimit: "100,000 requests per minute per account",
+    billing: false,
+    notes:
+      "OSS self-hosted: full entitlements, no Stripe/credits/paywall. In-repo docs: docs/api/",
     guidance: {
       recommended:
         "For most jobs (especially 5+ audio files): POST /api/v1/upload per file, then POST /api/v1/jobs with the returned paths",