v1.0.2 — windows stay exact

Quality fix

VDN's windowed softmax no longer routes through the model's optimized_attention_override. Quantized backends (sage / kitchen int8) on the local window measurably softened output versus the exact SDPA the released model was validated with — windows are exact again. Backend overrides still apply to the base model's own attention (text refiner, dense fallback on short clips).

Also in this release: example workflow re-exported from the UI with a preview image.