Stop per-request module re-imports leaking memory in production

Page rendering imported the SSR bundle and .server.ts modules with a
unique ?t= query on every request, in production too. Each one became a
new, never-evicted module record (and re-ran module top-level code), so
RSS grew with request count. Cache-bust only in dev via importFresh.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@moduletrace/bunext",
-    "version": "1.2.3",
+    "version": "1.2.4",
     "main": "dist/index.js",
     "module": "index.ts",
     "dependencies": {