Single sacrificial run -> generous logging without spam:
- GpuQuadJna: probe BOTH first ref convert (gpu_clt_ref) AND first scene convert
  (gpu_clt) — NaN%/nonzero/range each (probeClt helper).
- CuasMotion.correlatePair one-shot: log targets_mv / tp_ref,tp_img counts /
  erase_cltr,erase_clt / fpixels null-ness, plus TD-correlation read-back stats
  (tile count + NaN% of TD values) alongside the DBG-REF/DBG-IMG renders.

All gated/one-shot; no native change (reads via existing tp_proc_get_clt).
TEMP — remove with the rest of the -Dtp.dbg.corrpair probe.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>