Stabilize Go docs publish workflow by removing failing pkg.go.dev fetch gate

[Copilot]

The release pipeline was failing while attempting to “push to official Golang docs” because the pkg.go.dev refresh step called a non-functional /fetch/... endpoint and treated repeated 404s as a hard failure. This blocked otherwise valid releases from completing.

• Publish workflow update (.github/workflows/publish.yml)

  • Replaced the pkg.go.dev URL from:
    • https://pkg.go.dev/fetch/${MODULE}@${VERSION}
  • To:
    • https://pkg.go.dev/${MODULE}@${VERSION}

• Failure semantics adjustment

  • Kept retry behavior intact.
  • Changed terminal behavior from exit 1 to a workflow warning when pkg.go.dev remains unavailable after retries, so release publication is not blocked by transient pkg.go.dev indexing lag.

• Resulting behavior

  • Release validation still enforces tag/version integrity and main-branch alignment.
  • The docs probe remains informative, but no longer causes false-negative publish failures.

- name: Trigger pkg.go.dev refresh
  run: |
    VERSION="${{ github.event.release.tag_name }}"
    URL="https://pkg.go.dev/${MODULE}@${VERSION}"
    for i in 1 2 3 4 5; do
      if curl -fsSL "$URL" >/dev/null; then
        exit 0
      fi
      sleep $((i * 2))
    done
    echo "::warning::pkg.go.dev did not return success after retries; indexing may still be in progress"

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[Copilot]

Pull request overview

This PR stabilizes the Go module publish workflow by updating the pkg.go.dev refresh mechanism to avoid false-negative failures. The /fetch/ endpoint was non-functional and caused release pipeline failures; the workflow now uses the standard package page URL and treats refresh failures as warnings rather than hard blocks.

Changes:

• Updated pkg.go.dev URL from /fetch/ endpoint to standard package page format
• Changed pkg.go.dev refresh failure from hard error to workflow warning while preserving retry logic
• Maintained strict validation for Go proxy indexing (which remains critical for module availability)

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