Reads the precomputed Program Area metrics from the zone_metric
table instead of aggregating across cells. Returns the same shape
as scores_for_cells() so it's a drop-in replacement for the
score / flower-plot pipeline when the area is a Program Area.
Arguments
- con
a DBI connection (e.g. from
sdm_db_con())- pra_key
Program Area key (e.g. "CGM")
- metric_pattern
regex to filter
metric.metric_key(default:"_ecoregion_rescaled$")