Add QA test outputs, build scripts, and Dockerfile validation

- Created `qa-test-output-after-fix.txt` and `qa-test-output.txt` to log results of certificate page authentication tests.
- Added `build.sh` for deterministic backend builds in CI, utilizing `go list` for efficiency.
- Introduced `codeql_scan.sh` for CodeQL database creation and analysis for Go and JavaScript/TypeScript.
- Implemented `dockerfile_check.sh` to validate Dockerfiles for base image and package manager mismatches.
- Added `sourcery_precommit_wrapper.sh` to facilitate Sourcery CLI usage in pre-commit hooks.

frontend/src/components/SystemStatus.tsx

@@ -0,0 +1,17 @@
+import React from 'react';
+import { useQuery } from '@tanstack/react-query';
+import { checkUpdates } from '../api/system';
+
+const SystemStatus: React.FC = () => {
+  // We still query for updates here to keep the cache fresh,
+  // but the UI is now handled by NotificationCenter
+  useQuery({
+    queryKey: ['system-updates'],
+    queryFn: checkUpdates,
+    staleTime: 1000 * 60 * 60, // 1 hour
+  });
+
+  return null;
+};
+
+export default SystemStatus;