Use a conformant ComfyUI XMP namespace for AVIF metadata

Switch COMFYUI_XMP_NAMESPACE to http://ns.comfy.org/comfyui/1.0/, an
owned-domain, versioned URI ending in a trailing slash per XMP/RDF namespace
conventions, instead of the bare repo URL which lacked the trailing separator.

Author: austintraver

comfy_extras/nodes_images.py

@@ -911,7 +911,7 @@ def hlg_to_linear(t: torch.Tensor) -> torch.Tensor:
 # ---------------------------------------------------------------------------
 
 _PNG_SIGNATURE = b"\x89PNG\r\n\x1a\n"
-COMFYUI_XMP_NAMESPACE = "https://github.com/Comfy-Org/ComfyUI"
+COMFYUI_XMP_NAMESPACE = "http://ns.comfy.org/comfyui/1.0/"
 
 
 def _png_chunk(chunk_type: bytes, data: bytes) -> bytes:

tests-unit/comfy_extras_test/nodes_images_save_test.py

@@ -50,7 +50,7 @@
         setattr(comfy_extras, "nodes_images", original_nodes_images_attr)
 
 
-COMFYUI_XMP_NAMESPACE = "https://github.com/Comfy-Org/ComfyUI"
+COMFYUI_XMP_NAMESPACE = "http://ns.comfy.org/comfyui/1.0/"
 RDF_NAMESPACE = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"