fix: inputs/SALVIAS/validations.sql: _plots_18_list_of_subplots_codes_for_each_plot_for_each_project: changed columns to match output query

fix: inputs/SALVIAS/validations.sql: _plots_15_pct_cover_of_each_verb_taxon_in_each_plot_in_each_pro: changed types to match output query

bugfix: inputs/SALVIAS/validations.sql: _plots_15_pct_cover_of_each_verb_taxon_in_each_plot_in_each_pro: changed summarizing column from mean_cover->totalpercentcover to match output query

bugfix: inputs/SALVIAS/validations.sql: _plots_10a_aggregate_observation_individual_counts: changed individual_id type to match output query

schemas/vegbien.sql, inputs/SALVIAS/validations.sql: added _plots_10a_aggregate_observation_individual_counts, for use in debugging diffs in _plots_10_count_of_individuals_per_plot_in_each_proj

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