- Brought over enterprise's QueryLogReader, with small adjustments
- Time filters are for the run's ScheduledFor field, per spec
- Adjusted run log timestamps for consistent formatting:
- ScheduledFor is RFC3339 because it's a whole-second timestamp
- StartedAt, FinishedAt use RFC3339Nano for high precision
- Several test adjustments to use relative time, for easier integration
with storage retention