fix(docker): enumerate the active infra network

tests/unit/test_backend_secret_reprovision.py

@@ -297,6 +297,16 @@ class TestDockerAttachPrimitives(unittest.TestCase):
         self.assertEqual("ITEST-CA", res.ca_pem)
         infra.gateway.assert_called_once()
 
+    def test_running_bottles_uses_the_threaded_infra_network(self) -> None:
+        from bot_bottle.backend.docker.backend import DockerBottleBackend
+        infra = Mock(network="itest-network")
+        infra.gateway.return_value.name = "itest-gateway"
+        with patch.object(docker, "running_agent_containers") as running:
+            DockerBottleBackend(infra=infra)._running_bottles()
+        running.assert_called_once_with(
+            network="itest-network", gateway_name="itest-gateway",
+        )
+
     def test_gateway_attach_resources_defaults_to_the_host_singleton(self) -> None:
         # Ordinary construction (no infra) falls back to the per-host default.
         from bot_bottle.backend.docker.backend import DockerBottleBackend