The 519-line handler split into 12 independent, named check functions
(checks.js), the bogon-detection nested functions pulled out on their own
(bogon.js, no I/O, easiest to verify), and a slim orchestrator (index.js)
that runs Phase 1 fetch, dispatches all checks via Promise.race+allSettled
(same 5s-cap/10s-total behavior as before), scores, and assembles the
response -- each piece under 50 lines except the orchestrator's main
function itself.
Verified via node --check, eslint no-undef (2 known bugs remain: compare,
webhooks), and smoke-test harness (28/28 match, including a byte-for-byte
match on /api/validate's own response -- the highest-value confirmation
this decomposition preserved behavior exactly).
