Replace generated vae/ with SA-1.0's Diffusers-format Oobleck VAE (same arch)

Add project_cond_tokens / project_global_cond (state-dict-derived)

Update conditioner/config.json: parametric configs (qk_norm, sub-conditioner specs)

Update transformer/config.json: parametric configs (qk_norm, sub-conditioner specs)

Add required _diffusers_version field

Initial conversion from stabilityai/stable-audio-open-small via scripts/checkpoint_conversion/stable_audio_to_diffusers.py

initial commit