Add missing jira_tickets sync columns migration and improve error messages

- Add add_jira_sync_columns_pg.js migration (jira_id, jira_status, last_synced_at, created_by)
- Register in run-all.js before the flexible creation migration
- Replace all generic 'Internal server error' with actual err.message in jiraTickets routes
- Users and admins can now see the real failure reason instead of a useless generic message

backend/migrations/run-all.js

@@ -21,6 +21,7 @@ const POSTGRES_MIGRATIONS = [
     'add_vcl_vertical_metadata.js',
     'add_vcl_multi_vertical.js',
     'add_compliance_item_history.js',
+    'add_jira_sync_columns_pg.js',
     'add_flexible_jira_ticket_creation.js',
 ];