build: pin Trivy version to 0.57.1 for reproducible CI builds

Pin Trivy to version 0.57.1 instead of using @latest to ensure:
- Consistent security scan results between local and CI environments
- Reproducible builds across different environments
- Protection against unexpected failures from new Trivy releases

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: ManiDeepakThumu

devbox.json

@@ -4,7 +4,7 @@
     "kubectl@latest",
     "chart-testing@latest",
     "pre-commit@latest",
-    "trivy@latest",
+    "trivy@0.57.1",
     "checkov@3.2.336",
     "kubernetes-helm@latest",
     "actionlint@latest",