style(1b): auto-format + lint-clean the whole codebase (RL1)

Mechanical, semantics-preserving cleanup so the codebase passes the new lint stage:
- ruff format: all 32 Python files (wraps long signatures, normalizes quotes/blank lines).
- nixpkgs-fmt: modules/drone-runner.nix.
- shfmt (-i 2 -ci): scripts/*.sh.

Lint fixes (reviewed, behavior-preserving — no test weakened):
- ruff SIM105: try/except-pass -> contextlib.suppress (abra.py app_config rm; lifecycle.py janitor).
- ruff SIM115: open().read() -> with open() (run_recipe_ci.py redaction-values + gitea-token).
- statix: merge repeated sops `secrets.*` keys into one `secrets = { ... }` (comments kept);
  empty fn pattern `{ ... }:` -> `_:` (packages.nix).
- deadnix: drop unused lambda args (flake `self`; configuration.nix `lib`; overlay `final` -> `_`).

Verified on cc-ci: `scripts/lint.sh` -> lint: PASS; nixosConfigurations.cc-ci evaluates;
all Python byte-compiles. The deployed bridge/dashboard/runner source changes hash (reformat),
so cc-ci will be rebuilt to the new closure in W2 before the cold D1-D10 re-verification.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/lasuite-docs/test_install.py

@@ -4,6 +4,7 @@ minio + nginx) converges and serves the app over real HTTPS through the gateway.
 
 Login is OIDC-gated (no live OIDC provider in CI), so the functional assertion is that the frontend
 SPA is served (unauthenticated landing), not an authenticated flow."""
+
 import os
 import sys
 
@@ -27,7 +28,11 @@ def test_playwright_loads_frontend(deployed_app):
             ctx = browser.new_context(ignore_https_errors=True)
             page = ctx.new_page()
             resp = page.goto(url, wait_until="domcontentloaded", timeout=60000)
-            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 frontend"
         finally:
             browser.close()