Delete dynamic prices in a time window.

Deletes all dynamic-price entries on a DYNAMIC tariff whose timeStart falls within [timeStartFrom, timeStartTo). The window must span between 1 and 90 days inclusive; outside that range the request is rejected with 400 BAD_REQUEST and nothing is deleted.<br/><br/>Returns 204 No Content on success regardless of whether any rows actually matched the window (idempotent per HTTP semantics).<br/><br/>Required scope: tariffs:delete