Reduce WorkManager/BackgroundTasks Wake-Up Frequency to Improve Battery Life

[maugauwi-hash]

Area: Performance
Priority: Low
Estimated Time: 2 hours

Description:
Between PendingActionSyncWorker/CheckInSyncTask, VaultWidgetUpdateWorker/TTLWidget's timeline
refresh, and background TTL polling (BackgroundRefreshService), there are several independent
periodic background wake-ups per platform. Consolidating overlapping work into fewer wake-ups would
reduce battery impact without reducing effective freshness.

Tasks:

• Enumerate all periodic background work items per platform and their actual intervals
• Identify overlapping work (e.g., widget refresh and TTL polling both waking around the same time)
  that could be coalesced into a single scheduled unit
• Measure battery/wake-up impact before and after consolidation