PrivacyMetricsService only exposes getWeeklyStats() (a 7-day aggregate). Add getTodayStats(), which returns today's per-category counts in the same PrivacyMetricsStats shape, reusing _aggregateStats(). It queries TrackingDBService.getEventsByDateRange(now, now): the query day-truncates both bounds and events are bucketed by UTC date, so this selects exactly today's row. Differential Revision: https://phabricator.services.mozilla.com/D308833