Show series ID in patch list output

git_pw/patch.py

@@ -26,6 +26,7 @@
     'State',
     'Archived',
     'Delegate',
+    'Series',
 )
 _sort_fields = ('id', '-id', 'name', '-name', 'date', '-date')
 _default_states = (
@@ -451,6 +452,9 @@ def list_cmd(
             patch.get('state'),
             'yes' if patch.get('archived') else 'no',
             (patch.get('delegate') or {}).get('username', ''),
+            ','.join(
+                str(series.get('id')) for series in patch.get('series') or []
+            ),
         ]
 
         output.append([])

releasenotes/notes/patch-list-series-column-80217e480f850026.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    ``git pw patch list`` now shows a ``Series`` column with the ID of the
+    series each patch belongs to.

tests/test_patch.py

@@ -351,6 +351,22 @@ def test_list_with_formatting(self, mock_echo, mock_index, mock_version):
             mock.ANY, ('ID', 'Name'), fmt='simple'
         )
 
+    def test_list_with_series_column(
+        self, mock_echo, mock_index, mock_version
+    ):
+        """Validate that the series ID is included in the output."""
+
+        rsp = [self._get_patch()]
+        mock_index.return_value = rsp
+
+        runner = CLIRunner()
+        result = runner.invoke(patch.list_cmd, [])
+
+        assert result.exit_code == 0, result
+
+        output = mock_echo.call_args[0][0]
+        assert output[0][-1] == '321'
+
     def test_list_with_filters(self, mock_echo, mock_index, mock_version):
         """Validate behavior with filters applied.