OutlookSyncProvider implementing AbstractSyncProvider for
bidirectional Outlook Calendar sync. Uses Graph API delta query
for incremental pull, auto-refreshes OAuth tokens on 401, and
converts Outlook recurrence patterns to RRULE. Same conflict
resolution as CalDAV (last-write-wins + WS notification).
- src/agentkit/calendar/sync/outlook_provider.py — OutlookSyncProvider
- tests/unit/calendar/test_sync_outlook.py — 8 tests
chiguyong