Add custom nodes, Civitai loras (LFS), and vast.ai setup script

Includes 30 custom nodes committed directly, 7 Civitai-exclusive
loras stored via Git LFS, and a setup script that installs all
dependencies and downloads HuggingFace-hosted models on vast.ai.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom_nodes/comfyui_ultimatesdupscale/test/setup_utils.py

@@ -0,0 +1,20 @@
+import logging
+
+
+class SilenceLogs:
+    """Context manager to temporarily silence logging."""
+
+    def __enter__(self):
+        logging.disable(logging.CRITICAL)
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        logging.disable(logging.NOTSET)
+
+
+def execute(node, *args, **kwargs):
+    """Execute a ComfyUI node, handling both V3 and legacy schemas."""
+    if hasattr(node, "execute"):
+        return node.execute(*args, **kwargs)
+    else:
+        return getattr(node(), node.FUNCTION)(*args, **kwargs)