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

validation/aggregating/*/*.sql, schemas/vegbien.sql, lib/runscripts/validations.pg.sql.run, inputs/bien2_traits/validations.sql: added _ to beginning of each view name so the validation views would sort at the top in the datasource's tables list. this will also make the validation result sets easily distinguishable from the data tables.