Cancel batch of orders by order IDs

Queues cancellation for multiple orders by providing identifiers in a batch. The request body can contain either or both of: - `order_ids`: Array of order IDs assigned by Paradex - `client_order_ids`: Array of client-assigned order IDs ```json { "order_ids": ["order-id-1", "order-id-2"], "client_order_ids": ["client-id-1", "client-id-2"] } ``` Returns a 200 OK status code with detailed results for each order: ```json { "results": [ { "id": "order-id-1", "client_id": "client-id-X", "account": "account-1", "market": "BTC-USD-PERP", "status": "QUEUED_FOR_CANCELLATION" }, { "id": "order-id-2", "client_id": "client-id-Y", "account": "account-1", "market": "ETH-USD-PERP", "status": "ALREADY_CLOSED" }, { "id": "order-id-3", "client_id": "client-id-1", "account": "account-1", "market": "BTC-USD-PERP", "status": "QUEUED_FOR_CANCELLATION" }, { "client_id": "client-id-2", "status": "NOT_FOUND" } ] } ``` Each result includes: - `id`: Order ID (if the order was found) - `client_id`: Client order ID (if available) - `account`: Account that owns the order - `market`: Market of the order - `status`: One of: + `QUEUED_FOR_CANCELLATION`: Order was successfully queued for cancellation + `ALREADY_CLOSED`: Order was already in a closed state + `NOT_FOUND`: The order with the provided ID/client ID was not found Confirmation of cancellation will be sent via websocket or can be verified from GET /orders/:id endpoint. Orders that are already in a CLOSED state will be included in the response with status "ALREADY_CLOSED".