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]>

apps/dashboard/src/lib/features/search/components/command-palette.svelte

@@ -37,7 +37,7 @@
   const hasQuery = $derived(query.trim().length > 0);
   const hasServerResults = $derived(
     searchApi.results.course.length > 0 ||
-      searchApi.results.program.length > 0 ||
+      searchApi.results.cohort.length > 0 ||
       searchApi.results.widget.length > 0 ||
       searchApi.results.tag.length > 0 ||
       searchApi.results.audience.length > 0
@@ -133,8 +133,8 @@
         onSelect={handleSelect}
       />
       <SearchResultGroup
-        heading={$t('app.search.command_palette.groups.programs')}
-        items={groupItems('program')}
+        heading={$t('app.search.command_palette.groups.cohorts')}
+        items={groupItems('cohort')}
         fallbackIcon={Goal}
         onSelect={handleSelect}
       />