chore(release): public-release readiness fixes for 1.1.16

- Fix MIT LICENSE copyright placeholder
- Remove private flag and correct GitHub repository URL in package.json
- Bump version to 1.1.16
- Genericize committed config defaults (example.com/localhost)
- Harden global error handler against information leakage
- Generate random initial password for proxyadmin2 bootstrap account
- Correct docs to describe CONF_SECRETS instead of symlink behavior

Co-Authored-By: Claude <noreply@anthropic.com>

nodejs/package.json

@@ -1,7 +1,6 @@
 {
   "name": "proxy-api",
-  "version": "1.1.15",
-  "private": true,
+  "version": "1.1.16",
   "author": [
     {
       "name": "William Mantly",
@@ -48,7 +47,7 @@
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "https://git.theta42.com/wmantly/proxy.git"
+    "url": "https://github.com/theta42/proxy.git"
   },
   "devDependencies": {
     "nodemon": "^3.1.11"