lint: ruff format + one auto-fix so the push self-test is green again

`scripts/lint.sh --fix` from the pinned lint devshell: 90 Python files
reformatted (ruff format, mechanical) and one C420 (dict comprehension →
dict.fromkeys) in tests/unit/test_f211_sso_skip.py. The push self-test had
been failing at the lint stage since build 1313 (2026-08-31) on exactly
these files; nothing else changed.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FqkQq3CDmFWcQ7u1LzoyRz

tests/n8n/custom/test_workflow_roundtrip.py

@@ -178,17 +178,17 @@ def test_workflow_create_and_read_back(live_app):
         workflow_id,
         str(workflow_id),
     ), f"GET workflow id={fpayload.get('id')!r} != created id={workflow_id!r}"
-    assert (
-        fpayload.get("name") == name
-    ), f"workflow name didn't round-trip: created={name!r}, fetched={fpayload.get('name')!r}"
+    assert fpayload.get("name") == name, (
+        f"workflow name didn't round-trip: created={name!r}, fetched={fpayload.get('name')!r}"
+    )
     nodes = fpayload.get("nodes") or []
-    assert (
-        isinstance(nodes, list) and len(nodes) == 1
-    ), f"workflow nodes didn't round-trip: expected 1 node, got {len(nodes)}"
+    assert isinstance(nodes, list) and len(nodes) == 1, (
+        f"workflow nodes didn't round-trip: expected 1 node, got {len(nodes)}"
+    )
     node = nodes[0]
-    assert (
-        node.get("type") == "n8n-nodes-base.manualTrigger"
-    ), f"node type didn't round-trip: {node.get('type')!r}"
-    assert (
-        node.get("name") == "Manual Trigger"
-    ), f"node name didn't round-trip: {node.get('name')!r}"
+    assert node.get("type") == "n8n-nodes-base.manualTrigger", (
+        f"node type didn't round-trip: {node.get('type')!r}"
+    )
+    assert node.get("name") == "Manual Trigger", (
+        f"node name didn't round-trip: {node.get('name')!r}"
+    )