LEAN-07 (stored poses, all tiles, sum-scaled input): sqrt_l0 3.22 -> 5.58
(wider, not the predicted ~2.1), corr RMS 0.82 -> 1.005. At 16x signal-to-
fat-zero the normalize amplifies the blur-decorrelated high frequencies -
the fat zero was regularizing usefully. Root of the misdiagnosis: the width
comparison used the MB-COMPENSATED oracles (FILT150A 2.08, MBEN 2.75); the
correct no-MB control (NOMB oracle) has sqrt_l0 3.58 ~ lean's 3.22 - lean
peak shapes were normal all along, and Andrey's "there was no 16x
difference" was right where it mattered.

Consequences: (1) correlator input back to the true weighted average (the
same data as the -POSE-RT-COMPOSITE debug render - single upload again);
(2) the "fz-broadened peak content pull" roll-bias mechanism is falsified -
the +0.52/+0.33 mrad roll bias needs a new suspect (remaining engine
differences vs the NOMB oracle: neighbor consolidation min_str_neib,
min_confidence gates, peak-extraction parameters); (3) MB compensation in
lean (v2) is the main quality lever - MBEN sharpens peaks 3.6 -> 2.8 and
removes the 0.5 px wobble.

Verified: mvn -DskipTests clean package OK.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>