Phase A items 1-2 of the pose GPU-migration plan (Andrey's design 07/12/2026):
- curt.pose_mb_uniform (default ON): ONE motion-blur vector per scene shared by
  all tiles - constant-rpm CUAS flow is uniform up to the roll component (small)
  and wobble (2nd degree). Same Jacobian-times-rates as per-tile getMotionBlur,
  evaluated at the frame center and broadcast; rates = finite differences of
  predicted poses, unchanged. OFF = legacy per-tile path (A/B knob).
- curt.pose_cycles (default 3): EXACTLY N measure<->solve cycles, no convergence
  early exit (static GPU launch shape); convergence delta kept as QC printout
  (flags scenes missing the legacy exit_change_atr). 0 = legacy convergence exit.

Validation = pose_test run vs 07/12 JNA baseline (497/497, az/tilt/roll RMS
0.1355/0.0765/0.1005 px) - policy A/B by pose quality, not bit-exactness.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>