Monkey-patches dispatch_attention_fn to use simple Q@K^T@V matmul,
bypassing SDPA dispatch entirely. Enables editing at full 1024x1024
(was limited to 512x512 due to SDPA crashes) and is ~3x faster.
LoRA loading via PEFT crashes on ROCm; removed since user doesn't need
it. Added automatic downscaling of inputs >512px to avoid O(N^2)
attention explosion in the Qwen transformer (262K tokens at 1024^2
exceeds GPU capability). Added explicit GPU memory cleanup after each
command to prevent OOM when chaining generate + edit.
Qwen Image Edit pipeline with FP8 Safetensors loading.
Uses init_empty_weights for memory-efficient 40GB model loading.
bf16 dtype to avoid ROCm crashes; falls back to math SDPA.
