Per Andrey (no blind fixes - see what is going on): save the composite
(TD-averaged, grid-transformed) scenes actually correlated against the
virtual center, WITH the virtual render for comparison:

- curt.pose_img_save (checkbox "Pose test save composite scenes"):
  -POSE-RT-COMPOSITE.tiff hyperstack [t: real, virtual][z: scene] - the
  virtual-center render repeated for every scene so the component slider
  blink-compares at any z. z aligned with -POSE-RT-HYPER/-CORR2D.
- leanMeasure img_out holder: when requested, re-runs execConvertDirect
  with erase_clt=1 (NaN outside task tiles - the standard interCorrTD
  erase=-1 leaves the previous scene's tiles as ghosts in a render;
  correlation itself unaffected), then imclt renders sensor slot 0 = the
  consolidated average (last LMA cycle, converged pose).
- Virtual component = imclt of the reference buffer (what the conj-multiply
  actually sees), not a re-render from prepared data.

Observability only - processing unchanged, roll-bias symptom preserved.
Verified: mvn -DskipTests clean package OK.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>