Vercel Marketplace Upstash integration injects KV_REST_API_URL and
KV_REST_API_TOKEN — different names from vanilla Upstash signup
(UPSTASH_REDIS_REST_URL / UPSTASH_REDIS_REST_TOKEN). Adapter and
migration script now accept either form, so the operator doesn't have
to duplicate values when sharing an Upstash DB provisioned via the
Vercel integration. UPSTASH_* takes precedence when both are set.
Operator runs `npm run migrate` (reads admin + group docs from Atlas)
followed by `npm run migrate:bulk` (uploads via wrangler kv bulk put).
Cache collections are skipped by default since they auto-rebuild from
upstream APIs; --include-cache flag migrates them with TTL preserved.
- mongodb is added as a devDependency only — never enters the Worker
bundle, the Worker still talks to KV exclusively.
- scripts/.atlas-export.json is gitignored (contains exported state).
- README documents the one-time runbook.
tiennm99