New python module for accessing SDS ClickHouse Database
This is the first step in creating a python client for the SDS clickhouse database.
It's pretty simple at the moment:
- search for exact matches of PV names in the database
- the data queries for now are limited to:
- pv name
- start time
- end time
 
The plan is to add more search and query functionality in the future.
The returned data format is a dictionary of polars dataframes. I don't know if this is the best choice or not, but currently ops-data-client is setup to use this, and polars seems easier to work with than pandas.