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-registry/node_modules/send/SECURITY.md

@@ -0,0 +1,24 @@
+# Security Policies and Procedures
+
+## Reporting a Bug
+
+The `send` team and community take all security bugs seriously. Thank you
+for improving the security of Express. We appreciate your efforts and
+responsible disclosure and will make every effort to acknowledge your
+contributions.
+
+Report security bugs by emailing the current owner(s) of `send`. This information
+can be found in the npm registry using the command `npm owner ls send`.
+If unsure or unable to get the information from the above, open an issue
+in the [project issue tracker](https://github.com/pillarjs/send/issues)
+asking for the current contact information.
+
+To ensure the timely response to your report, please ensure that the entirety
+of the report is contained within the email body and not solely behind a web
+link or an attachment.
+
+At least one owner will acknowledge your email within 48 hours, and will send a
+more detailed response within 48 hours indicating the next steps in handling
+your report. After the initial reply to your report, the owners will
+endeavor to keep you informed of the progress towards a fix and full
+announcement, and may ask for additional information or guidance.