Add a curt_cond_test path (boolean at the top of the CUAS-RT dialog) that,
inside the curt_en branch, renders the 16 per-sensor images and saves them to
the -CENTER instance for calibration inspection:
- CuasMotion.perSensorAveragesFromTD: imclt the per-sensor TD, print the
  16-sensor average spread, save -CUAS-PERSENSOR (16-slice stack, per-slice
  avg labels). Saves via the -CENTER instance, not gpuQuad.getQuadCLT().
- CuasMotion.perSensorFromRawJp4: read RAW /jp4/ per-sensor (oracle getJp4Tiff,
  one thread/sensor), force-H2D (bypass the "GPU mem already correct" verify),
  execConvertDirect from raw, save -CUAS-PERSENSOR-RAW (uncorrected baseline;
  calibration stays a separate "cheat"). RT-seed for the future SATA raw
  stream; GPU port later with Java as oracle.

Fix the NaN border on the RT SUBAVG-CONV2D product:
- CuasDetectRT subtract-average -> NaN-tolerant union (average only non-NaN
  scenes per pixel), matching the oracle -CUAS-MERGED-CUAS; the plain sum
  NaN-propagated (one missing scene poisoned the pixel in every frame ->
  thick border after LoG).
- CuasRTUtils.convolve2DLReLU -> NaN-aware (NaN out only if the center is NaN;
  substitute the center value for NaN taps), so the LoG can't bloom a thin
  border into a thick NaN frame.
- Add -SUBAVG-PRELOG save (post-subtract-avg, pre-LoG) for bisecting.

Compiles (mvn -DskipTests clean package). WIP: the raw-path values/edge and the
in-memory-vs-file (MERGED-CUAS) divergence are still under review; the ~28px
edge residual is traced to the temporal subtract-average at the rotation-swept
composite edge. See ANDREY_CONTINUE.md open items.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>