Bulk Export Job Fails with 400 Bad Request on Digital Channel Metadata

What is the reason the /api/v2/recording/bulkexportjobs endpoint returns a 400 Bad Request when filtering for digital channel types? The payload below is valid JSON, but the system rejects it immediately. This blocks our legal hold workflow.

{
 "dateFrom": "2023-10-01T00:00:00Z",
 "dateTo": "2023-10-31T23:59:59Z",
 "filter": "channelType=digital",
 "includeMetadata": true
}

The filter syntax appears incorrect for the bulk export endpoint. Try using conversationType instead of channelType, as digital channels are often categorized differently in the backend.

"filter": "conversationType=digital"

Verify the exact enum values in the documentation. The dashboard metrics often use different terminology than the API.