## Changes
- Add findInBuffer() to BufferService for looking up checks still in the write buffer
- Add updateLocationResults() to IChecksRepository interface and MongoChecksRepository
- Update GlobalpingService to return GlobalpingCheckResult[] instead of MonitorStatusResponse[]
## Benefits
Non-destructive service additions that prepare the backfill pipeline.
Existing check-writing and Globalping flows are unchanged.
gorkem-bwl
Alex Holliday