The keystone parser. Header-driven & version-tolerant: it reads MET
.stat / per-type .txt / MODE output (CTC, CTS, SL1L2, CNT, PCT, PSTD,
PRC, RHIST, ECNT, ORANK) and feeds the consolidated lib/met-stats.mjs.
Sample data below is SYNTHETIC but byte-shaped like real MET output —
paste or drop a real .stat file to replace it. Every ingested
string is rendered with textContent (injection-safe at the ingestion boundary).