Clarify in FPGA_DATA_ANALYSIS.md that the ROI and azimuthal definitions
are also evaluated on CPU via the shared image_analysis library, so they
apply to the DECTRIS SIMPLON (EIGER) path that has no FPGA, not only the
FPGA-accelerated JUNGFRAU/PSI path. Document the three NXmx writer formats
(Legacy/VDS/Integrated) and the two acquisition workflows in CLAUDE.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>