Post-mortem showed both CLT buffers loaded but inter-correlation -> 0 tiles.
index_inter_correlate selects by __popc(sel_sensors); static reading says
sel_sensors should be 1 (single-cam rectilinear), so a runtime value differs.
- GpuQuadJna.execCorr2D_inter_TD: one-shot print sel_sensors/popc/num_cams/
  num_colors/scales + the returned num_corr_tiles.
- saveTDRender: makeArrays NPE'd on null titles (derefs titles[i]); pass a
  non-null titles[] so the render saves instead of crashing the run.
TEMP — remove with the rest of the -Dtp.dbg.corrpair probe.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>