Pulse data entry point
There is an API prepared but no implementation yet. We need:
- PulseMeta object with minimum data: timestamp, Id, Ivolved Systems PVs/info (no data!)
- API top-level to provide a list of pulses for time span
getPulses(startTs, endTs) -> list(PulseMeta)
- API top-level
getPulseData(pulseMeta) -> data of invlovedSystems
(there is a skeleton inpychiver.Archiver
already)