🤖 feat: implement Helm parity phases 1-2 for CoderControlPlane #451

Job	Run time
Detect changed paths	28s
Codex Comments	41s
lint	1m 20s
test	1m 10s
Terraform (fmt/validate/tflint/trivy)	0s
Lint GitHub Actions	0s
E2E (Kind + CNPG + Templates)	28s
Publish GHCR :main	0s
	4m 7s

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