Work order charts
Counts come from the search index (SearchWorkOrderNodesAsync with aggregations); each chart is one bucket-terms aggregation.
Work orders by status
Work orders by type
Work orders by priority
Work orders by technician region
AssignedTo → Technician.Region
Work orders by site city
OccursAt → Site.Address.City
Work orders by target asset type
Targets → Asset.AssetType
Work orders by invoice status
BilledBy → Invoice.Status