feat: add dashboard metrics service

internal/services/store.go

@@ -125,6 +125,7 @@ func Migrate(db *sql.DB) error {
 	);
 
 	CREATE INDEX IF NOT EXISTS idx_image_tasks_status_created_at ON image_tasks(status, created_at);
+	CREATE INDEX IF NOT EXISTS idx_image_tasks_created_at ON image_tasks(created_at);
 	CREATE INDEX IF NOT EXISTS idx_image_task_results_task_id ON image_task_results(task_id);
 
 	CREATE TABLE IF NOT EXISTS app_logs (
@@ -138,6 +139,7 @@ func Migrate(db *sql.DB) error {
 
 	CREATE INDEX IF NOT EXISTS idx_app_logs_level_created_at ON app_logs(level, created_at);
 	CREATE INDEX IF NOT EXISTS idx_audit_logs_action_created_at ON audit_logs(action, created_at);
+	CREATE INDEX IF NOT EXISTS idx_audit_logs_created_at ON audit_logs(created_at);
 	`)
 	if err != nil {
 		return err