External driver doesn’t exit after client disconnect

[unsuman]

Description

The external driver(server) process keeps running even after the limactl(client) exits, even though a keep‑alive timeout is implemented.

lima/pkg/driver/external/server/server.go

Lines 65 to 73 in 96c7179

	kaProps := keepalive.ServerParameters{
	Time: 10 * time.Second,
	Timeout: 20 * time.Second,
	}
	kaPolicy := keepalive.EnforcementPolicy{
	MinTime: 10 * time.Second,
	PermitWithoutStream: true,
	}

StopAllExternalDrivers() in main.go normally stops these processes, and the keep‑alive in the server.go should auto‑exit the driver after ~20s of inactivity, but manual testing shows it never terminates, suggesting the keep‑alive isn’t triggering.

EDIT: The keep-alive timeouts don't shut down the server automatically. We need our own logic to handle this.