Group and count

POST /deliverable/group-and-count

{ "groupByField": "type" }

Group by multiple fields:

{ "groupByField": ["computed.projectId", "type"] }

For array fields (e.g. tags), use unnestGroupByField to count individual values:

{ "groupByField": "computed.tags", "unnestGroupByField": true }

All standard filter params work here too.