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

runner/harness/card.py

@@ -98,7 +98,7 @@ def _stage_rows(stages: list[dict]) -> str:
         scolor = STATUS_COLOR.get(st.get("status", ""), "#8b949e")
         rows.append(
             f'<tr class="stage"><td colspan="2"><span class="mark" style="color:{scolor}">{smark}</span>'
-            f'<b>{html.escape(st.get("name", "?"))}</b></td>'
+            f"<b>{html.escape(st.get('name', '?'))}</b></td>"
             f'<td class="st" style="color:{scolor}">{html.escape(st.get("status", ""))}</td></tr>'
         )
         for t in st.get("tests", []):
@@ -175,7 +175,7 @@ def render_card_html(data: dict, screenshot_rel: str | None = "screenshot.png")
         ok = bool(flags.get(key))
         flag_bits.append(
             f'<span class="flag" style="border-color:{"#3fb950" if ok else "#f85149"}">'
-            f'{STATUS_MARK["pass"] if ok else STATUS_MARK["fail"]} {lbl}</span>'
+            f"{STATUS_MARK['pass'] if ok else STATUS_MARK['fail']} {lbl}</span>"
         )
     show_shot = bool(screenshot_rel) and bool(data.get("screenshot"))
     shot_html = (