feat: add geolocation fields to session and implement geo stats endpoint

- Added country, city, countryCode, latitude, and longitude fields to the Session model.
- Updated geoip service to fetch and store geolocation data based on user IP.
- Created a new admin endpoint to retrieve geolocation statistics, including user counts by country and city.
- Enhanced admin page to display geolocation statistics with expandable city details.
- Introduced caching for geolocation data to optimize performance.

apps/backend/src/modules/admin/admin.routes.ts

@@ -4,6 +4,7 @@ import { requireSuperAdmin } from '@/middlewares/require-super-admin.middleware'
 import { blockUserHandler } from '@/modules/admin/handlers/block-user.handler';
 import { createPlanHandler } from '@/modules/admin/handlers/create-plan.handler';
 import { deletePlanHandler } from '@/modules/admin/handlers/delete-plan.handler';
+import { getGeoStatsHandler } from '@/modules/admin/handlers/get-geo-stats.handler';
 import { getUserSessionsHandler } from '@/modules/admin/handlers/get-user-sessions.handler';
 import { listComplexesHandler } from '@/modules/admin/handlers/list-complexes.handler';
 import { listPlansAdminHandler } from '@/modules/admin/handlers/list-plans-admin.handler';
@@ -40,6 +41,8 @@ adminRoutes.delete(
   deletePlanHandler
 );
 
+adminRoutes.get('/geo-stats', getGeoStatsHandler);
+
 adminRoutes.get('/users', listUsersHandler);
 adminRoutes.post(
   '/users/:id/block',