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>

---------

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

apps/dashboard/src/lib/features/ui/navigation/lms-navigation.ts

@@ -73,10 +73,10 @@ export const baseNavConfig: NavItemConfig[] = [
     matchPattern: '^/lms/explore(/.*)?$'
   },
   {
-    titleKey: 'lms_navigation.programs',
-    path: '/programs',
+    titleKey: 'lms_navigation.cohorts',
+    path: '/cohorts',
     icon: GoalIcon,
-    matchPattern: '^/lms/programs(/.*)?$'
+    matchPattern: '^/lms/cohorts(/.*)?$'
   },
   {
     titleKey: 'lms_navigation.exercise',

apps/dashboard/src/lib/features/ui/navigation/org-navigation.ts

@@ -117,10 +117,10 @@ export const baseNavConfig: NavItemConfig[] = [
   },
   {
     group: 'content',
-    titleKey: 'org_navigation.programs',
-    path: '/programs',
+    titleKey: 'org_navigation.cohorts',
+    path: '/cohorts',
     icon: GoalIcon,
-    matchPattern: '^/org/[^/]+/programs(/.*)?$'
+    matchPattern: '^/org/[^/]+/cohorts(/.*)?$'
   },
   {
     group: 'content',