update go module dependencies

[ben-s-go-updater]

Automated Go toolchain + dependency update.

• dependencies updated: 3
• gate green: precommit, check, vulncheck (exit 0)
• notes: go directive already at 1.27.2; bulk update bumped bborbe/http, google/pprof, k8s.io/kube-openapi indirect deps; all gates green

CHANGELOG entry stays under ## Unreleased — the release agent versions and tags on merge.

[ben-s-pull-request-reviewer]

No Go source files changed. The ast-grep funnel already ran (zero findings). This is a pure dependency update — bborbe/http, google/pprof, and k8s.io/kube-openapi all updated as indirect deps. No Go source code to review.

{
  "verdict": "approve",
  "summary": "Dependency-only update touching only go.mod/go.sum/CHANGELOG.md — three indirect deps updated (bborbe/http, google/pprof, k8s.io/kube-openapi) with no Go source changes.",
  "comments": [],
  "concerns_addressed": [
    {
      "concern": "correctness: dependency updates are valid and don't break the build",
      "disposition": "addressed",
      "detail": "go.mod shows three indirect dep updates: bborbe/http v1.26.29→v1.26.30, google/pprof pseudo-version update, k8s.io/kube-openapi pseudo-version update. go.sum updated accordingly. No direct/source dependencies changed."
    },
    {
      "concern": "security: updated indirect deps introduce vulnerabilities",
      "disposition": "addressed",
      "detail": "Updated deps are all indirect (// indirect comment present). bborbe/http patch update, google/pprof and k8s.io/kube-openapi are pseudo-version date-based updates. No known CVEs in these specific updates."
    },
    {
      "concern": "CHANGELOG.md entry is properly formatted",
      "disposition": "addressed",
      "detail": "CHANGELOG.md under ## Unreleased contains 'chore: update go module dependencies' — follows repo convention per changelog-guide.md."
    }
  ]
}