Introduce reversible padding support and transform metadata for Image/Mask Autosize.
- Add a new 'pad' crop_mode that preserves aspect ratio with reversible padding.
- Introduce AutosizeTransform dataclass and AUTOSIZE_TRANSFORM IO type.
- Add helper functions (_to_samples, _from_samples, _apply_transform, _resize_samples) and use them in ImageAutosize.
- Add two nodes: ImageAutosizeApplyTransform and ImageAutosizeRestore to apply transforms to aligned masks and restore original dimensions.
- Update tests, README, and CHANGELOG and bump package version to 0.3.0.
Rebuild ImageAutosize to use ComfyUI V3 node API: add a proper ComfyExtension entrypoint and io.Schema-based node. Rename display to "Image/Mask Autosize", accept IMAGE or MASK inputs, and replace multiplier output with scale_x/scale_y. Add constraint_priority (min_size/max_size), anchored crop handling, divisible-by rounding protection, and new interpolation modes. Update README, add CHANGELOG, bump package version to 0.2.0, refresh workflow image, and include comprehensive unit tests for sizing, cropping, and mask behavior.
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