Fix notebook: use open SDXL VAE (no auth), 4ch latents, correct scaling

Fix VAE: switch to madebyollin/sdxl-vae-fp16-fix (open, no auth needed, 4ch latent)

Update README with Colab-optimized training workflow and dataset presets

Update notebook: latent pre-caching + small dataset presets for Colab

Add optimized training v2 with latent pre-caching for Colab

Fix: SDXL VAE (no login) + streaming dataset in notebook

Fix: SDXL VAE (no login), streaming dataset, step-based training

Fix: use SDXL VAE (4ch, no login needed)

Fix: streaming dataset in notebook (no full download on Colab)

Fix: streaming dataset (no full download), step-based training loop

Add Colab training notebook

Add training pipeline

Add model architecture

Add README with architecture docs and usage guide

initial commit