feat(api-nodes): network client v2: async ops, cancellation, downloads, refactor (#10390)

* feat(api-nodes): implement new API client for V3 nodes

* feat(api-nodes): implement new API client for V3 nodes

* feat(api-nodes): implement new API client for V3 nodes

* converted WAN nodes to use new client; polishing

* fix(auth): do not leak authentification for the absolute urls

* convert BFL API nodes to use new API client; remove deprecated BFL nodes

* converted Google Veo nodes

* fix(Veo3.1 model): take into account "generate_audio" parameter

comfy_api_nodes/nodes_luma.py

@@ -35,9 +35,9 @@ from comfy_api_nodes.apis.client import (
 from comfy_api_nodes.apinode_utils import (
     upload_images_to_comfyapi,
     process_image_response,
-    validate_string,
 )
 from server import PromptServer
+from comfy_api_nodes.util import validate_string
 
 import aiohttp
 import torch