fix: inputs/SALVIAS/validations.sql: renamed SiteCode to plot_code to match output queries

inputs/SALVIAS/validations.sql: use plot_code instead of plotcode for easier readability

bugfix: *.sql: public.source_by_shortname(): need to wrap it in a nested SELECT because Postgres incorrectly does not constant-fold (inline) it, leading to a slowdown when it is therefore run many times. this is done using the steps at wiki.vegpath.org/Postgres_queries#wrap-function-call-in-nested-SELECT .

fix: inputs/SALVIAS/validations.sql: plotMetadata.SiteCode: need to match types with the output query column

fix: inputs/SALVIAS/validations.sql: _plots_02_list_of_project_names: altered column aliases to match output query

inputs/SALVIAS/validations.sql: added Brad's comments from validation/aggregating/plots/SALVIAS/bien3_validations_salvias_db_original.VegCore.sql

added inputs/SALVIAS/validations*.sql

fix: schemas/vegbien.sql: _traits_08_taxonname_trait_and_value_for_first_5000_records: renamed to _traits_08_taxonname_trait_and_value because this actually includes all the records, not just the first 5000. this uses the new public_validations.rename_query_view() to rename all associated tables and views, including handling truncated names.

bugfix: inputs/bien2_traits/validations.sql: _traits_01_count_records: changed column names to match public_validations._traits_01_count_records

bugfix: inputs/bien2_traits/validations.sql: use a wrapper function for util.ifnull() so that the views don't get dropped when the util schema is reinstalled