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/express/lib/middleware/init.js

@@ -0,0 +1,43 @@
+/*!
+ * express
+ * Copyright(c) 2009-2013 TJ Holowaychuk
+ * Copyright(c) 2013 Roman Shtylman
+ * Copyright(c) 2014-2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var setPrototypeOf = require('setprototypeof')
+
+/**
+ * Initialization middleware, exposing the
+ * request and response to each other, as well
+ * as defaulting the X-Powered-By header field.
+ *
+ * @param {Function} app
+ * @return {Function}
+ * @api private
+ */
+
+exports.init = function(app){
+  return function expressInit(req, res, next){
+    if (app.enabled('x-powered-by')) res.setHeader('X-Powered-By', 'Express');
+    req.res = res;
+    res.req = req;
+    req.next = next;
+
+    setPrototypeOf(req, app.request)
+    setPrototypeOf(res, app.response)
+
+    res.locals = res.locals || Object.create(null);
+
+    next();
+  };
+};
+