new file: serv_nginx/api_bb/internal/scripts/migrate_existing_users.go
modified: serv_nginx/api_bb/internal/service/auth_service.go
modified: serv_nginx/api_bb/internal/service/user_stats_service.go
modified: serv_nginx/bbvue/src/views/Achievements.vue
modified: serv_nginx/bbvue/src/views/Reviews.vue
modified: serv_nginx/bbvue/src/views/Training.vue
fix bag with no stats into table
new file: serv_nginx/api_bb/internal/handlers/user_stats_handler.go
modified: serv_nginx/api_bb/internal/routes/routes.go
modified: serv_nginx/api_bb/internal/service/user_stats_service.go
add EndPoints for user stats
modified: serv_nginx/api_bb/internal/repository/personal_best_repository.go
new file: serv_nginx/api_bb/internal/service/achievement_service.go
new file: serv_nginx/api_bb/internal/service/personal_best_service.go
new file: serv_nginx/api_bb/internal/service/user_stats_service.go
add some services