fix: convert all f-strings to .format() to avoid heredoc escaping issues

artifact_comfyui_download.sh

@@ -204,8 +204,8 @@ try:
 
     if category == 'settings':
         settings = config.get('settings', {})
-        print(f"CACHE_DIR={settings.get('cache_dir', '/workspace/huggingface_cache')}")
-        print(f"PARALLEL_DOWNLOADS={settings.get('parallel_downloads', 1)}")
+        print("CACHE_DIR={0}".format(settings.get('cache_dir', '/workspace/huggingface_cache')))
+        print("PARALLEL_DOWNLOADS={0}".format(settings.get('parallel_downloads', 1)))
     elif category == 'categories':
         for cat_name in config.get('model_categories', {}).keys():
             print(cat_name)
@@ -218,11 +218,11 @@ try:
             essential = model.get('essential', False)
             model_type = model.get('type', 'checkpoints')
             filename = model.get('filename', '')
-            print(f"{repo_id}|{description}|{size_gb}|{essential}|{model_type}|{filename}")
+            print('{0}|{1}|{2}|{3}|{4}|{5}'.format(repo_id, description, size_gb, essential, model_type, filename))
     else:
         sys.exit(1)
 except Exception as e:
-    print(f"ERROR: {e}", file=sys.stderr)
+    print("ERROR: {0}".format(e), file=sys.stderr)
     sys.exit(1)
 EOPYAML
 }
@@ -388,7 +388,7 @@ try:
     )
     print("SUCCESS")
 except Exception as e:
-    print(f"ERROR: {e}", file=sys.stderr)
+    print("ERROR: {0}".format(e), file=sys.stderr)
     sys.exit(1)
 EOPYDOWNLOAD