Retrieve alert-based delay data aggregated by line over a date range.

Parameters for the /api/linedelays endpoint.

Attributes: start_date: Start of date range (YYYY-MM-DD). end_date: End of date range (YYYY-MM-DD). line: Line identifier (e.g., Red, Orange, Green-B). agg: Aggregation level — daily or weekly. Defaults to weekly.

Response for /api/linedelays — alert-based delay data for a transit line.

Attributes: data: Delay data, daily or weekly depending on the agg parameter.