docs(ci): B01 delivery tracker — draft / no merge - #31

Linked issue

Refs #13. Nonclosing reference; no issue closure is authorized.

PR type

• Documentation only (type:docs)

Summary

• Establish the draft/no-merge tracker for the authorized B01 feature-branch chain.
• Record the 266-line first child and its isolated local verification.
• Keep integration, issue closure and releases outside this authorization.

Changes

Test plan

• Documentation reviewed for scope, privacy, source consistency and nonclosing issue linkage.
• git diff --check passed; one documentation file, 48 additions.
• No shell scripts or skills changed: shellcheck and skill-loading checks are not applicable.
• Remote CI is pending; no merge-readiness claim.

Contributor checklist

• Linked issue Pin CI tools and workflows to verified immutable SHAs with least privilege #13 has status:approved (verified target-host read).
• Exactly one available type label requested: type:docs.
• Conventional commit; no co-author trailers.
• Required remote CI confirmed on the tracker revision.

Chain Context

Chain Overview

main
 └── 📍 chore/b01-ci-tracker — draft / no merge
      └── ci/b01-portable-runner — first child, pending creation

Scope and autonomy

• Includes: tracker documentation only.
• Excludes: runner implementation, security gate, workflow assets, bootstrap modules and new skills.
• One deliverable scope, independently reversible without unrelated source changes.
• Documentation and structural checks cover this unit.
• Remote CI observed on this PR branch.