Document the rot3d path that was missing: a new section on combining a
reflection's per-frame partials into one full (de-biased weighted combine,
captured fraction, capture-aware systematic uncertainty, XDS-order full
re-scaling) so the merge sees counting statistics instead of rocking-curve
slicing. Recast the profile-radius and mosaicity sections as what the system
does - profile radius as the intrinsic (bandwidth-deconvolved) width, mosaicity
by ML with a search window wide enough to capture the rocking tail and held
fixed during scaling - rather than the optimisation narrative.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>