- Add seed() method to ModelUsageTracker for bulk-loading persisted entries at startup - Create PostgresModelUsageStore for persistence of model usage counters to Postgres - Store only current cumulative snapshots (no historical time-series) - Use standard CREATE TABLE IF NOT EXISTS idiom matching other Postgres stores - Add comprehensive mocked unit tests for both components Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>