Normalize README metadata and formatting

Normalize model-card metadata and README formatting across Comfy-Org: use a consistent key and tag order, add upstream/base-model metadata where applicable, normalize code fences, remove redundant separators, and ensure a final newline.

README.md

@@ -1,9 +1,13 @@
 ---
 license: apache-2.0
 tags:
-  - diffusion-single-file
-  - comfyui
+- comfyui
+- diffusion-single-file
+base_model:
+- DiffSynth-Studio/Qwen-Image-Blockwise-ControlNet-Canny
+- DiffSynth-Studio/Qwen-Image-Blockwise-ControlNet-Depth
 ---
+
 # Qwen-Image DiffSynth ControlNets
 
 Repackaged model files for ComfyUI.
@@ -20,3 +24,8 @@ Place the files in the following folders:
 │   │   ├── qwen_image_depth_diffsynth_controlnet.safetensors
 │   │   └── qwen_image_inpaint_diffsynth_controlnet.safetensors
 ```
+
+## Upstream sources
+
+- [DiffSynth-Studio/Qwen-Image-Blockwise-ControlNet-Canny](https://huggingface.co/DiffSynth-Studio/Qwen-Image-Blockwise-ControlNet-Canny)
+- [DiffSynth-Studio/Qwen-Image-Blockwise-ControlNet-Depth](https://huggingface.co/DiffSynth-Studio/Qwen-Image-Blockwise-ControlNet-Depth)