post `/v1/notifications/channels/{id}/deliveries/{deliveryId}/resend`

Resend a delivery（attempts 归零重计 3 次配额）

Free (not billed). 已 delivered 的投递 → 400。

Auth: Authorization: Bearer ac-… · billed per call (see Credits) — envelope {success,data,credit_cost} or {success:false,error}.

Name	In	Type	Description
`id` *	path	`string`	channel id
`deliveryId` *	path	`string`	delivery id（deliveries 列表行）

Status	Description	Body
`200`	OK	application/json — `object`
`default`	Error	application/json — `ErrorResponse`

post /v1/notifications/channels/{id}/deliveries/{deliveryId}/resend