Save in-progress keysat integration and StartOS 0.4 work

Snapshot of the working tree before cleanup. Captures:
- Keysat licensing: server/license.js, /api/license/* endpoints in
  server/index.js, activation modal in public/index.html, embedded
  Ed25519 issuer key (assets/issuer.pub).
- StartOS 0.4 expansion: setApiKey action, version files v0.1.1
  through v0.1.15, file-models/config.json.ts, manifest updates.
- Self-hosted registry server (startos-registry/).
- Build/deploy scripts (bin/bump-version.sh, bin/deploy.sh, vendored
  yt-dlp binary), .gitignore, .deploy.env.example.
- Recent design docs (KEYSAT_INTEGRATION.md, UPGRADE-DESIGN.md) —
  retained here so they remain recoverable when removed in the
  follow-up cleanup commit.

startos/manifest/index.ts

@@ -5,13 +5,11 @@ export const manifest = setupManifest({
   id: 'youtube-summarizer',
   title: 'YouTube Summarizer',
   license: 'Proprietary',
-  packageRepo: 'https://github.com/user/youtube-summarizer-startos',
-  upstreamRepo: 'https://github.com/user/youtube-summarizer',
-  marketingUrl: 'https://github.com/user/youtube-summarizer',
+  packageRepo: 'https://ten31.xyz',
+  upstreamRepo: 'https://ten31.xyz',
+  marketingUrl: 'https://ten31.xyz',
   donationUrl: null,
-  docsUrls: [
-    'https://github.com/user/youtube-summarizer/blob/main/README.md',
-  ],
+  docsUrls: [],
   description: { short, long },
   volumes: ['main'],
   images: {