Publish the Ruby gem (turbodocx-sdk) to RubyGems

Summary

The Ruby SDK is implemented and tested in packages/ruby-sdk/, but the turbodocx-sdk gem has never been published to RubyGems. Anyone following the docs and running gem install turbodocx-sdk gets a failure.

Because of that, the Ruby documentation pages are currently hidden from the published docs site (draft: true) — see TurboDocx/Docs#118. They stay hidden until this ships.

Prerequisite — the publish secret

Per docs/ARCHITECTURE.md, publish-ruby.yml pushes via the RUBYGEMS_API_KEY repo secret, and that secret must be configured before the first gem release:

• Create a RubyGems API key with push scope for turbodocx-sdk
• Add it as the RUBYGEMS_API_KEY repo secret

Publish

• Confirm the version in both Ruby version sites is correct and matches the other SDKs (per .claude/rules/versioning.md, Ruby carries the version twice):
  • packages/ruby-sdk/turbodocx-sdk.gemspec → spec.version
  • packages/ruby-sdk/lib/turbodocx_sdk.rb → VERSION =
• bundle exec rspec green
• Cut the ruby-sdk-v* release tag (the publish workflow is guarded to that tag prefix)
• Verify the gem is live: gem install turbodocx-sdk from a clean environment

After publishing — un-hide the docs

In the Docs repo:

• Remove draft: true (and the accompanying comment) from the 5 Ruby pages: ruby.md, deliverable-ruby.md, quote-ruby.md, webhooks-ruby.md, partner-ruby.md
• Restore the Ruby entries in sidebars.js for the 4 public SDK categories only: TurboSign, Deliverable, TurboWebhooks, TurboQuote.
  Do NOT add a TurboPartner entry — TurboPartner is a gated/sales-led program (separate TDXP- credentials) and is intentionally kept out of the sidebar, search and sitemap (see Docs commit 1032df9).
• partner-ruby.md: replace draft: true with unlisted: true so it matches its js/py/php/go/java siblings — reachable by direct URL for partners, but not listed. Do not add it to the sidebar or the index.
• Restore the Ruby rows in the 5 SDK tables on docs/SDKs/index.md, plus the Ruby install/code tabs
• Restore the Ruby tab in docs/TurboSign/Webhooks.md
• Re-add ruby sdk / "and Ruby" to the index frontmatter description + keywords

The hiding commit documents exactly what to reverse.