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/controlaltai-nodes/choose_upscale_model_node.py

@@ -0,0 +1,30 @@
+class ChooseUpscaleModel:
+    @classmethod
+    def INPUT_TYPES(cls):
+        return {
+            "required": {
+                "upscale_model_1": ("UPSCALE_MODEL",),
+                "upscale_model_2": ("UPSCALE_MODEL",),
+                "use_model_1": ("BOOLEAN", {"default": True}),
+            }
+        }
+
+    RETURN_TYPES = ("UPSCALE_MODEL",)
+    RETURN_NAMES = ("upscale_model",)
+    FUNCTION = "choose_upscale_model"
+
+    CATEGORY = "ControlAltAI Nodes/Logic"
+
+    def choose_upscale_model(self, upscale_model_1, upscale_model_2, use_model_1):
+        if use_model_1:
+            return (upscale_model_1,)
+        else:
+            return (upscale_model_2,)
+
+NODE_CLASS_MAPPINGS = {
+    "ChooseUpscaleModel": ChooseUpscaleModel,
+}
+
+NODE_DISPLAY_NAME_MAPPINGS = {
+    "ChooseUpscaleModel": "Choose Upscale Model",
+}