Added start_date, end_date, and filter_by query parameters to the
GET /api/marketing/ endpoint. Users can now filter marketing records
by a date range using either so_date (Sales Order date, default) or
created_at as the target column.
Changes:
- validation: added StartDate, EndDate (YYYY-MM-DD format), and
FilterBy (oneof: so_date, created_at) to DeliveryOrderQuery struct
- controller: parse the three new query params in GetAll handler
- service: apply >=start / <end+1day date range filter in the query
modifier using the existing utils.ParseDateRangeForQuery helper
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ValdiANS