feat(cohorts): rename Programs to Cohorts with data migration (#694)

* feat(cohorts): rename Programs to Cohorts with data migration

- Add cohort database tables and Drizzle migration alongside legacy program tables
- Introduce migrate-programs-to-cohorts script to copy existing program data safely
- Rename API routes (/cohort), services, queries, validation, and error codes
- Rename dashboard feature module, routes (/cohorts), navigation, and translations
- Update docs, emails, and internal compliance cron endpoints for cohort terminology
- Keep legacy program tables in place for rollback until explicitly removed

Co-authored-by: Rotimi Best <[email protected]>

* fix(db): restore migrate:answer-data script alongside cohort migration

Co-authored-by: Rotimi Best <[email protected]>

* fix(db): cast program enums when migrating data to cohort tables

Co-authored-by: Rotimi Best <[email protected]>

* fix(db): truncate cohort tables before program-to-cohort copy

Co-authored-by: Rotimi Best <[email protected]>

* fix(db): report accurate row counts in programs-to-cohorts migration

Co-authored-by: Rotimi Best <[email protected]>

---------

Co-authored-by: Cursor Agent <[email protected]>
Co-authored-by: Rotimi Best <[email protected]>

packages/db/package.json

@@ -62,6 +62,7 @@
     "db:setup:seed": "tsx src/scripts/db-setup.ts --seed",
     "db:exercise-backfill": "tsx src/scripts/backfill-exercise-course.ts",
     "migrate:answer-data": "tsx src/scripts/migrate-answer-data.ts",
+    "migrate:programs-to-cohorts": "tsx src/scripts/migrate-programs-to-cohorts.ts",
     "db:assets-backfill": "tsx src/scripts/backfill-lesson-assets.ts",
     "db:rewrite-media-host": "tsx src/scripts/rewrite-media-host.ts",
     "db:login-link": "tsx src/scripts/generate-login-link.ts",