Per Andrey: (1) calibration reuse is now automatic - if -POSE-RT-MAXDXY exists
it is used (filtered run), else a full run generates it; new
curt_pose_recalc flag forces regeneration (replaces the backwards
curt_pose_use_filt enable). Matches the FPN reuse pattern. (2) MAXDXY stores
NaN instead of +inf for NaN-in-any-scene tiles - deriveSelection rejects NaN
and +inf identically (non-finite), and NaN keeps the TIFF viewable in ImageJ
(+inf broke min/max autoscaling).

mvn compile clean (Eyesis closed).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>