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 <rotimi-best@users.noreply.github.com>

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

Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

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

Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

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

Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

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

Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

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Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

packages/db/src/queries/index.ts

@@ -15,7 +15,7 @@ export * from './newsfeed';
 export * from './submission';
 export * from './tag';
 export * from './course-import';
-export * from './program';
+export * from './cohort';
 export * from './widget';
 export * from './jobs';
 export * from './media-transcript';