Options for sending a message with delay or scheduling.
optional
delayMs: number
Delay in milliseconds before the message becomes available
optional
scheduledAt: Date
Explicit scheduled delivery time
optional
deadLetterQueue: string
Override the default dead letter queue for this message
optional
priority: number
Message priority (higher = more important, if supported)
optional
headers: Record<string, string>
Arbitrary key-value pairs to attach to the message