Spamming server errors during subagent execution

### Describe the bug

There are a lot of transient server errors, especially during subagent tasks. Every time I run anything using fleet or anything that requires a subagent task, I'll get 10-15 or more copies of "Response was interrupted due to a server error. Retrying...".

Nothing seems to be affected, and the /tasks read-only view does not show any issues.

### Affected version

GitHub Copilot CLI 1.0.74-0

### Steps to reproduce the behavior

_No response_

### Expected behavior

It would be nice if the messages could be collapsed into one, for example, that updates a disruption count in place, or even just a little "Unstable connection, 5 retries" at the bottom somewhere.

### Additional context

_No response_

Comienza reproduciendo una tarea de fleet o subagent en GitHub Copilot CLI 1.0.74-0 y observa los mensajes de reintento junto con la vista de solo lectura /tasks. Rastrea dónde se emiten los mensajes repetidos "Response was interrupted due to a server error. Retrying..."; el trabajo estará terminado cuando los reintentos transitorios se representen mediante un único mensaje agrupado o un contador de interrupciones sin cambiar el comportamiento de la tarea.

Escrito por el modelo de indexación a partir del texto del issue.