Added a configurable timeout knob

internal/usecase/runner.go

@@ -215,6 +215,9 @@ func mergeModelTarget(base domain.ModelTarget, override *domain.ModelTarget) dom
 	if override.TopP != 0 {
 		out.TopP = override.TopP
 	}
+	if override.TimeoutSeconds != 0 {
+		out.TimeoutSeconds = override.TimeoutSeconds
+	}
 	return out
 }