feat(publish): trigger CDN cache invalidation on local version bumps

- Add postversion hook to invalidate caches when version is bumped locally
- Runs after npm/pnpm version commands
- Ensures caches are purged even before publishing

Author: jdalton

packages/socket/package.json

@@ -37,6 +37,7 @@
   "scripts": {
     "build": "node scripts/build.mjs",
     "postpublish": "node ../../scripts/invalidate-cdn-cache.mjs $npm_package_version",
+    "postversion": "node ../../scripts/invalidate-cdn-cache.mjs $npm_package_version",
     "test": "vitest run",
     "test:coverage": "vitest run --coverage",
     "test:watch": "vitest",