Align lint workflow Go toolchain with go.mod requirement

[Copilot]

The lint GitHub Actions job failed because it resolved to a preinstalled Go toolchain older than the version required by go.mod. This change makes the lint workflow derive its Go version from the module declaration so lint runs against the same toolchain the project requires.

• Root cause addressed

  • actions/setup-go in the lint workflow did not specify a version source, so CI selected go1.24.x while the module requires go1.25.0.

• Workflow change

  • Updated .github/workflows/golangci-lint.yml to pin toolchain resolution to go.mod via go-version-file.

• Resulting behavior

  • The lint job now uses the repository-declared Go version instead of a runner default, preventing version-mismatch failures during package loading.

- uses: actions/setup-go@v7
  with:
    go-version-file: 'go.mod'

[mdelapenya]

@copilot there are conflicts, resolve them

[Copilot]

@copilot there are conflicts, resolve them

Resolved by updating the lint workflow to align with the current main-branch action version while keeping the Go toolchain fix. Addressed in commit 798c278.