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/keycloak/custom/test_password_grant_token.py

@@ -43,17 +43,17 @@ def test_password_grant_issues_valid_jwt(live_app):
     token = kc_admin.admin_token(live_app, password)
 
     # Shape: a JWT is exactly 3 base64url segments
-    assert (
-        isinstance(token, str) and token.count(".") == 2
-    ), f"access_token does not look like a JWT (no 3 segments): len={len(token) if token else 0}"
+    assert isinstance(token, str) and token.count(".") == 2, (
+        f"access_token does not look like a JWT (no 3 segments): len={len(token) if token else 0}"
+    )
 
     payload = _decode_jwt_payload(token)
 
     # iss = the issuer URL, must be the per-run domain's /realms/master endpoint
     expected_iss = f"https://{live_app}/realms/master"
-    assert (
-        payload.get("iss") == expected_iss
-    ), f"JWT iss claim {payload.get('iss')!r} != {expected_iss!r}"
+    assert payload.get("iss") == expected_iss, (
+        f"JWT iss claim {payload.get('iss')!r} != {expected_iss!r}"
+    )
 
     # azp = authorized party (which client requested this token)
     assert payload.get("azp") == "admin-cli", f"JWT azp claim {payload.get('azp')!r} != 'admin-cli'"
@@ -68,6 +68,6 @@ def test_password_grant_issues_valid_jwt(live_app):
 
     # iat (issued at) is also a standard claim
     iat = payload.get("iat")
-    assert (
-        isinstance(iat, int) and iat <= time.time() + 60
-    ), f"JWT iat {iat!r} not a reasonable past timestamp"
+    assert isinstance(iat, int) and iat <= time.time() + 60, (
+        f"JWT iat {iat!r} not a reasonable past timestamp"
+    )