style: repo-wide lint pass — make the lint gate green again

Push builds have been RED on the lint step since ~build 209 from accumulated
formatting drift. This is the mechanical cleanup: ruff format + ruff --fix
(UP038 isinstance unions, SIM105 contextlib.suppress, UP031 f-strings, SIM115
tempfile context manager), shfmt -i 2 -ci, nixpkgs-fmt/statix/deadnix (merged
attrsets, dropped unused lib args), yamllint, and shell quoting fixes in
tests/lasuite-docs/setup_custom_tests.sh. No behaviour changes intended;
lint: PASS, unit tests: 138 passed.

tests/immich/test_install.py

@@ -7,7 +7,8 @@ import os
 import sys
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "runner"))
-from harness import browser as harness_browser, generic, lifecycle  # noqa: E402
+from harness import browser as harness_browser  # noqa: E402
+from harness import generic, lifecycle
 
 
 def test_serving_and_frontend(live_app, meta):
@@ -25,7 +26,11 @@ def test_serving_and_frontend(live_app, meta):
             resp = harness_browser.goto_with_retry(
                 page, url, accept_statuses=(200, 301, 302), goto_timeout_ms=60_000
             )
-            assert resp is not None and resp.status in (200, 301, 302), f"page status {resp and resp.status}"
+            assert resp is not None and resp.status in (
+                200,
+                301,
+                302,
+            ), f"page status {resp and resp.status}"
             assert "<html" in page.content().lower(), "no HTML served by the immich frontend"
         finally:
             browser.close()