move corpus-derived legacy label artifacts to t2a-mommy

move per-corpus label ledgers to t2a-mommy / t2a-daddy

Qwen3-Omni Instruct + Captioner bench labels

Qwen3-Omni labeler bench

labeler bench: 6 open models + CLAP embeddings

bench clips (16k wav) for labeler comparison

open audio-LLM labeler benchmark vs Gemini-Pro (pilot clips)

Gemini Pro audio-only labels: 8.6k clips + round history

Gemini audio-only relabel pilot: 3k clips, Pro + flash ledgers