One-shot tooling for the speedcdnjs → KV-backed worker-api migration.

Everything in this directory is transitional. It exists to verify the new worker returns the same data as the legacy metadata.speedcdnjs.com origin, and should be deleted once the migration is complete and the shadow-comparison D1 is no longer needed.

• create-d1.sh — Provisions the per-env D1 database that backs the shadow-comparison drift table (see src/shadow.js and migrations/0001_shadow_mismatches.sql). Two-phase: create prints a database_id you paste into worker-api-cdnjs-account-wrangler.toml, then migrate applies the schema remotely.

  ./scripts/migration/create-d1.sh staging create
  # paste database_id into worker-api-cdnjs-account-wrangler.toml
  ./scripts/migration/create-d1.sh staging migrate

When the migration is complete:

1. Drop SHADOW_DB, SHADOW_ORIGIN, SHADOW_SAMPLE_RATE from worker-api-cdnjs-account-wrangler.toml.
2. Delete src/shadow.js and the shadowCompare call in src/index.js.
3. Delete the D1 databases: npx wrangler d1 delete cdnjs-shadow-mismatches-{staging,production}.
4. Delete this directory.