perf(falukant): deploy prebuilt models and release WebGL contexts

frontend/scripts/optimize-glb.mjs

@@ -35,8 +35,9 @@ function removeStaleOptimizedModels(outputDir) {
   if (!fs.existsSync(outputDir)) {
     return;
   }
+  const cleanAllModels = process.env.CLEAN_MODEL_OUTPUT === 'true';
   for (const file of fs.readdirSync(outputDir)) {
-    if (file.endsWith('_opt.glb')) {
+    if (file.endsWith('_opt.glb') || (cleanAllModels && file.endsWith('.glb'))) {
       fs.unlinkSync(path.join(outputDir, file));
     }
   }