Tile selection (deriveSelection): new interior gate per Andrey's 07/13 ruling -
usable = finite calibration (measured in EVERY scene) shrunk by curt.pose_shrink
tiles (TileNeibs 8-dir, default 2; array-border ring cleared explicitly). Excludes
the partial-OOB band (soft margin 12 px = 1.5 tiles) so every selected tile keeps
all 16 sensors interior at every scene pose - enables the fixed per-sequence GPU
tile list with the consolidation OOB pass bypassed by host policy.

leanMeasure: sort task streams by (tileY, tileX) - setInterTasks* fill from worker
threads, so tile order was nondeterministic run-to-run; the fixed selection + sort
= the static task-stream contract for the pose_corr checkpoint (rung 1).

New dialog knob (CUAS RT tab): "Pose tile selection shrink (tiles)"
(curt.pose_shrink, corr-xml _curt_pose_shrink).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>