Fixes made in astrodb_utils v1.3 to make this possible.

schema updated in #674 to work with astrodb_utils functions.

For the 14 sources, are the spectral types easily findable somewhere in the Zhang papers?

We also need to double check the discovery references for these 14 new sources.

For the 14 sources, are the spectral types easily findable somewhere in the Zhang papers?

Yes! their spectral types are all listed in Table 2 of the Zhang paper (linked here). I also checked on SIMBAD and the references all point to the Zhang papers for these 14 sources

Discovery refs confirmed to be Zhang18. Spectral types found, one found to be an M6 and not needed in SIMPLE. Add those 13 spectral types to this PR.