chore: bump ext-apps to 1.7.3 (#680)

No SDK API changes since 1.7.2.

Examples:
- Add lazy-auth-server example (#679)
- Publish lazy-auth-server to npm (added to publish workflows)

Also syncs example dependency ranges to ^1.7.0 (output of npm run bump).

examples/quickstart/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/quickstart",
-  "version": "1.7.2",
+  "version": "1.7.3",
   "type": "module",
   "private": true,
   "description": "Quickstart MCP App Server example",
@@ -15,7 +15,7 @@
     "start": "concurrently --raw \"cross-env NODE_ENV=development INPUT=mcp-app.html vite build --watch\" \"tsx watch main.ts\""
   },
   "dependencies": {
-    "@modelcontextprotocol/ext-apps": "^1.0.0",
+    "@modelcontextprotocol/ext-apps": "^1.7.0",
     "@modelcontextprotocol/sdk": "^1.29.0",
     "cors": "^2.8.5",
     "express": "^5.1.0"