CLAUDE: 3-B rung B0 - one-shot attribution micro-measurements (grid transform, task build, MB setup, conditioning split)

Design: attic/imagej-elphel-internal/handoffs/2026-07-16_3b_measure_chain_residency_design.md
(all 4 rulings approved 07/16). B0 = attribute before B1 deletes the stages:

- grid transform (pose_lma_debug>=1, once/program): warm re-runs of
  transformToScenePxPyD full-grid vs selection-only x multi vs single
  thread - splits thread-array churn / full-grid-for-150-tiles waste /
  irreducible per-tile ERS work.
- task build: warm multi vs single-thread setInterTasksMotionBlur rebuild.
- MB setup: warm repeat of uniformMotionBlur (sizes the B2 descriptor win).
- conditioning (once/program, both direct and preloaded paths): prepare /
  cpu-condition / setBayerImages H2D / gpu-condition split - sizes B4's
  pinned+async overlap honestly (only the H2D share can hide).

One-shot: extra runs land in 'leanMeasure other' for a single call, steady
state unchanged. No behavior change; mvn -DskipTests package PASS.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>