Add nodes/scene_validator_node.py: SceneValidatorNode, a thin adapter that
delegates to validate_scene (MASTER_SPEC §20).
- Required input scene (SCENE model, serialized via to_json); optional config
(COMPILER_CONFIG) defaulting to Config() when unconnected.
- Outputs (scene, warnings, errors): the validated SCENE plus warnings/errors
passed through unchanged. No compiler logic in the node.
- Registered as SceneCompilerValidator ("Scene Validator").
Tests: node metadata/inputs, valid scene pass-through, delegation + message
surfacing + config threading (monkeypatched), default config when absent, and
ComfyUI registration.
Co-authored-by: kunail0804 <kunail0804@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>