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/unit/test_dashboard.py

@@ -174,10 +174,17 @@ def test_level_badge_shows_level_coloured(monkeypatch):
 def _write_run(base, run_id, recipe, finished, **kw):
     d = os.path.join(base, run_id)
     os.makedirs(d, exist_ok=True)
-    doc = {"recipe": recipe, "finished": finished, "run_id": run_id,
-           "ref": kw.get("ref", "deadbeefcafe"), "version": kw.get("version"),
-           "level": kw.get("level", 5), "screenshot": kw.get("screenshot", "screenshot.png"),
-           "results": kw.get("results", {"install": "pass"}), "flags": kw.get("flags", {})}
+    doc = {
+        "recipe": recipe,
+        "finished": finished,
+        "run_id": run_id,
+        "ref": kw.get("ref", "deadbeefcafe"),
+        "version": kw.get("version"),
+        "level": kw.get("level", 5),
+        "screenshot": kw.get("screenshot", "screenshot.png"),
+        "results": kw.get("results", {"install": "pass"}),
+        "flags": kw.get("flags", {}),
+    }
     with open(os.path.join(d, "results.json"), "w") as fh:
         json.dump(doc, fh)
 
@@ -193,8 +200,12 @@ def test_history_sourced_from_local_artifacts(tmp_path, monkeypatch):
     # mixed numeric + named ids; out-of-order on disk; the timestamp MUST decide order, not the id
     _write_run(base, "753", "bsky", 1781663348, results={"install": "pass"})
     _write_run(base, "427", "bsky", 1781178768, results={"install": "pass"})
-    _write_run(base, "m2r-bsky", "bsky", 1781121610, level=0, results={"install": "pass", "backup": "fail"})
-    _write_run(base, "423", "bsky", 1781178063, results={"install": "pass"})  # 423<427 numerically but OLDER
+    _write_run(
+        base, "m2r-bsky", "bsky", 1781121610, level=0, results={"install": "pass", "backup": "fail"}
+    )
+    _write_run(
+        base, "423", "bsky", 1781178063, results={"install": "pass"}
+    )  # 423<427 numerically but OLDER
     _write_run(base, "9", "other", 1781000000)  # different recipe, must not leak in
     # graceful-skip cases (the host's in-flight/failed-early dirs)
     os.makedirs(os.path.join(base, "EMPTY"), exist_ok=True)  # in-flight dir, no results.json

tests/unit/test_f211_sso_skip.py

@@ -66,7 +66,7 @@ def _load_conftest():
 class _FakeItem:
     def __init__(self, keywords):
         # pytest `item.keywords` supports `in`; a dict suffices.
-        self.keywords = {k: True for k in keywords}
+        self.keywords = dict.fromkeys(keywords, True)
         self.markers = []
 
     def add_marker(self, mark):

tests/unit/test_gitea_dep.py

@@ -176,6 +176,5 @@ def test_scm_redirect_assertions(location_url, gitea_domain, client_id, expect_p
     ]
     all_pass = all(checks)
     assert all_pass == expect_pass, (
-        f"Expected {'pass' if expect_pass else 'fail'} for URL {location_url!r}; "
-        f"checks: {checks}"
+        f"Expected {'pass' if expect_pass else 'fail'} for URL {location_url!r}; checks: {checks}"
     )