fix(terraform): support AWS provider v5 region data

[jmgilman]

Summary

• use the AWS region data source attribute supported by provider v5 consumers
• keeps the reusable Terraform module usable from downstream stacks that still pin AWS provider v5

Testing

• tofu fmt -check -recursive terraform
• TF_DATA_DIR=$(mktemp -d) tofu -chdir=terraform init -backend=false -input=false && tofu -chdir=terraform validate && tofu -chdir=terraform test

Note: provider v6 emits a deprecation warning for data.aws_region.current.name, but this is the compatible attribute for provider v5 consumers.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	github-token-broker	9fd93c6	Commit Preview URL Branch Preview URL	Apr 29 2026, 11:52 PM