Table Data Transformation Function

An Airtable Interface may need to display records grouped by a selected field. Given a list of record objects, transform them into one summary object per group while preserving the order in which groups first appear.

Implement group_records(records, group_field, value_field, label_field).

For each group:

1. Use record[group_field] as the group name.
2. Add record[value_field] to the group's numeric total.
3. Count the number of records in the group as count.
4. Collect distinct values from record[label_field] in first-seen order as labels.
5. Return groups in first-seen order. Within labels, preserve first appearance order.

Each input record contains all requested fields. Values in label_field are strings, and values in value_field are integers or floats. Do not mutate the input records.

Formal Specification

Input: records, a list of dictionaries, plus three strings naming fields. Return a list of dictionaries with keys group, total, count, and labels.