[JamieMagee]

What are you trying to accomplish?

Raise the minimum Go version to 1.27 so local builds and CI match the Docker toolchain.

Anything you want to highlight for special attention from reviewers?

The Docker image already uses Go 1.27. No dependency changes.

How will you know you've accomplished your goal?

• go test -race -shuffle=on -count=2 ./...: passed on Go 1.27.3.
• go mod tidy -diff, go build ./..., go vet ./...: passed.
• git ls-files -z -- '*.go' ':!:vendor/**' | xargs -0 gofmt -l, git diff --check: passed.

Docker-based script/test and yamllint . were not run because Docker and yamllint are unavailable.

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[Copilot]

🟢 Approval recommended

The two version updates are consistent with the existing toolchain, and no blocking issues were identified.

No open issues 🎉

What changed in this PR

Raises the proxy’s minimum Go version to 1.27, aligning local builds and CI with the existing Docker toolchain.

Changes:

• Updates the module’s minimum Go version to 1.27.0.
• Updates the README prerequisite to Go 1.27 or later, with no dependency changes.

File	Description
README.md	Documents the Go 1.27 minimum requirement.
go.mod	Sets the minimum Go version to 1.27.0.

_{Review effort: Balanced}