feat: wire rule registry and client-authenticated callback into server runtime

- Add ruleRegistry and onClientAuthenticated options to YonexusServerRuntime
- Dispatch rewritten rule messages (rule::sender::content) to rule registry
- Guard onClientAuthenticated behind promoteToAuthenticated return value
- Fix transport message handler: use tempConn directly when ws is in temp state,
  preventing stale _connections entry from causing promoteToAuthenticated to fail
- Close competing temp connections with same identifier on promotion
- Expose __yonexusServer on globalThis for cross-plugin communication
- Remove auto-failure on admin notification miss; pairing stays pending

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -5,6 +5,9 @@
   "description": "Yonexus.Server OpenClaw plugin scaffold",
   "type": "module",
   "main": "dist/plugin/index.js",
+  "openclaw": {
+    "extensions": ["./dist/Yonexus.Server/plugin/index.js"]
+  },
   "files": [
     "dist",
     "plugin",