🤖 refactor: upgrade terraform EKS versions and backend docs #155

Job	Run time
Detect changed paths	29s
Codex Comments	37s
Lint GitHub Actions	1m 7s
Terraform (fmt/validate/tflint/trivy)	47s
lint	-1s
test	-1s
E2E Smoke (Kind)	-1s
Publish GHCR :main	0s
	2m 57s

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