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/unpipe/index.js

@@ -0,0 +1,69 @@
+/*!
+ * unpipe
+ * Copyright(c) 2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = unpipe
+
+/**
+ * Determine if there are Node.js pipe-like data listeners.
+ * @private
+ */
+
+function hasPipeDataListeners(stream) {
+  var listeners = stream.listeners('data')
+
+  for (var i = 0; i < listeners.length; i++) {
+    if (listeners[i].name === 'ondata') {
+      return true
+    }
+  }
+
+  return false
+}
+
+/**
+ * Unpipe a stream from all destinations.
+ *
+ * @param {object} stream
+ * @public
+ */
+
+function unpipe(stream) {
+  if (!stream) {
+    throw new TypeError('argument stream is required')
+  }
+
+  if (typeof stream.unpipe === 'function') {
+    // new-style
+    stream.unpipe()
+    return
+  }
+
+  // Node.js 0.8 hack
+  if (!hasPipeDataListeners(stream)) {
+    return
+  }
+
+  var listener
+  var listeners = stream.listeners('close')
+
+  for (var i = 0; i < listeners.length; i++) {
+    listener = listeners[i]
+
+    if (listener.name !== 'cleanup' && listener.name !== 'onclose') {
+      continue
+    }
+
+    // invoke the listener
+    listener.call(stream)
+  }
+}