All 2141 vendor-written GTC v3 files match BeadArrayFiles field by field
and re-encode byte-identically; all IDAT pairs parse; the 2.45M-locus BPM,
dbv-7 EGT and CSV manifest agree with BeadArrayFiles and each other.
Run on a self-destructing AWS spot instance (42 min, ~$0.20).
Research notes R1-R4, documentation-study files A-E (source of the
functional spec's `src:` tags) and PGx coverage CSVs, rewritten to use
neutral naming and current project decisions (plan §2).