Validation fallback

Validate in stages: static contract and Python parse; import inside ComfyUI's own Python environment; restart; discovery in /object_info; then one small workflow execution. filesystem presence is never proof that a node loaded. After a repair, restart and rediscover. Do not promise hot reload.

Pin local catalog checks with --where local. If the result reports object_info_stale, it came from a cache: restart ComfyUI and re-run that command, and treat the catalog as proof of what loaded only once the warning is gone. comfy nodes refresh re-pulls annotations, not /object_info, and a browser reload changes neither.

Check one registration form, unique non-empty node/input/output ids, declared callable existence, and report dependency/filesystem/network behavior. A static scan cannot prove dynamic behavior is absent.