sql_quote should also handle vectors
Don't camel-case DB names, stick with under_scores everywhere
Give up on lengthcell / variance in DB for now, not sure it makes sense.
BEGIN TRANSACTION doesn't return anything
WIP: Survey import code
Remove aggregate_survey_data, was an interesting diversion into useless avenues in R
Add mfdb_transaction, to auto-rollback on error
Call lookup tables taxonomies, have explicit ids, names should be ltree-compatible
Fix comparison between numeric and string id
Add species data from DST^2