Update model card examples

Update model card

Fix: bundle audio_vae+vocoder config metadata (mel_bins etc.)

README: buzzer one-liner + farm example (same bundled refs)

Update usage to the buzzer example (bundled references)

Add model card

Add bundled audio VAE + vocoder (365MB)

Add ScenA audio-only reference-conditioned checkpoint (arefs-20s-abs-adv-best-sh @02387100)

initial commit