Rewrite NEXTGEN_INTEGRATOR.md from the early design draft into a full
record: the diagnosis (our intensities are accurate and unbiased per ANODE,
~2x noisier than XDS), the experiment ledger of what worked and the many
dead ends, the reusable tooling, and an honest assessment of the remaining
gap. Fix the stale ProfileIntegrate2D.h header (it is wired and the default
integrator, not a draft).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
leonarski_fandClaude Opus 4.8
6e3c52bf91