Ingesting proper motions

I’m working on ingesting a single source that has ra,dec, J,H,K photometry, pm_ra & pm_dec. From the api, there are ingest functions for name, source, photometry, photometry_filter, instrument, and publication. For ingesting things like proper motions, is `ingest_proper_motion` (see https://github.com/SIMPLE-AstroDB/SIMPLE-db/blob/main/scripts/ingests/Gaia/ingest_gaia.py line 151) outdated? I don’t see it in the astrodb_utils github. The other option I see is in the astrodb template’s ingest_pso0318 file where you can directly insert the values to a table
```
with db.engine.connect() as conn:
conn.execute(db.RadialVelocities.insert().values(rv_data))
conn.commit()
```
Is the insert option the right way to go?

Compare the ingest functions in astrodb_utils with scripts/ingests/Gaia/ingest_gaia.py around line 151 and the astrodb template’s ingest_pso0318 example. First determine whether proper-motion ingestion is still supported, then establish and document the accepted path for inserting pm_ra and pm_dec values. Done means the supported approach is clear and tested against the relevant database table.

Written by the indexing model from the issue text.