data(step1): grounded sample palette — 149 corpus folders (clap:fine)

Layered resolver (L1 filename -> L3 batched CLAP audio -> L2 folder cross-check).
116 homogeneous, 33 kit-like, 20 folder-name disagreements flagged (cpluck->synth,
amencutup->snare, sunny_brass->pad, nujazz_keys125->lead...) — audio overrides the
name, flags surface for review not silent override. max_files=6, ~7min.