Add CodeBoarding architecture analysis

[ivanmilevtues]

This PR adds the CodeBoarding GitHub Action via two workflows:

• codeboarding-sync.yml: on every push to dev, commits
  .codeboarding/analysis.json (your architecture baseline + readable docs). This is
  what the CodeBoarding viewer opens.
• codeboarding.yml: runs on every push to a pull request, keeping an
  architecture-diff comment current and uploading that PR’s analysis as a build artifact
  for the viewer’s PR diff. Each run continues from the one before it, so a push costs a
  fraction of a full analysis.

Both are needed: sync produces the baseline; review diffs against it.

Sync delivery

Sync commits the generated baseline directly to dev.

Works out of the box

Just merge it: the Action runs on the free tier, with no secret to add. The
id-token: write permission lets it identify your repo to CodeBoarding’s hosted LLM,
metered against a weekly limit for the repository owner.

Want more, or unmetered, usage?

Switching is a change to these workflow files rather than a secret you add, because the
file names which credentials a run uses. Re-run setup from your
CodeBoarding dashboard and pick:

• a CodeBoarding plan (unmetered, and raises the analysis-depth ceiling from 3 to 10), or
• your own provider key: OpenRouter, Anthropic, OpenAI, Google, AWS Bedrock and
  others.

That opens a second pull request with the one-line change, and tells you which secret to
add under Settings → Secrets and variables → Actions.

Opened for you by CodeBoarding.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-06T21:51:18.758598Z	d5451b0	PR opened

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[github-actions]

CodeBoarding review · analyzing…

⏳ CodeBoarding is analyzing this pull request's architecture changes.

_{run 34062030568 · attempt 1}