schemas/vegbien.sql: location: location_unique_within_parent: Split into *_by_sourceaccessioncode and *_by_authorlocationcode_position, with each ID being matched separately. This way, if the initial import of a subplot's location provides both fields, but fkey references use only one field, the fkey references will still match the existing location because only one of the fields needs to match.
schemas/vegbien.sql: location: location_unique_within_parent: Split into *_by_sourceaccessioncode and *_by_authorlocationcode_position, with each ID being matched separately. This way, if the initial import of a subplot's location provides both fields, but fkey references use only one field, the fkey references will still match the existing location because only one of the fields needs to match.