Migrating Next.js from node:sqlite to Cloudflare D1

A developer migrated a Next.js app from Node's built-in node:sqlite to Cloudflare D1 for deployment on Workers. The SQL stayed the same, but the database module had to switch from synchronous to asynchronous API. Four changes were needed: moving schema to migrations, rewriting the module, retrieving the D1 binding, and adding await at call sites.