Get receipt print job with real-time updates

Streams real-time updates for a receipt print job using Server‑Sent Events (SSE) with content type text/event-stream.

Each message in the stream is an SSE event with:

• data: a JSON object with receipt status fields (no formal schema available for SSE payload)
• a blank line terminates each event frame

Semantics:

• The stream emits receipt status updates as they occur.
• When the receipt reaches a final status (for example, PRINTED or FAILED), a last event is sent and the stream is closed.
• If the receipt is already final when requested, a single event is sent and the connection is closed immediately.

Possible statuses:

• NOT_PRINTED
• ENQUEUED
• PRINTING
• PRINTED
• FAILED
• UNKNOWN

Possible status reasons:

• TIMEOUT
• BUSY
• OUT_OF_PAPER
• OVERHEATED
• COVER_OPEN
• LOW_BATTERY
• OTHER

Connection behavior:

• The server may close the connection after approximately one minute of inactivity; clients should reconnect if updates are still expected.

Wire example: data: {"receipt_id":"...","status":"PRINTED","status_reason":null,"updated_at":"2025-09-10T12:30:45Z"}

Note: The response schema below describes the structure of the JSON object placed in the SSE data field, not the SSE framing itself.