PROD-038A Define Base add-chain promotion checklist

[rndrntwrk]

Canonical source: docs/release/github-project-production-backlog.md

Epic: Parked And Add-Chain Epics

• ID: PROD-038A
• Title: Define Base add-chain promotion checklist
• Type: docs
• Priority: P2
• Scope: parked
• Area: base
• Description: Keep Base as a non-blocking add-chain lane with one explicit
  re-entry checklist so the team can promote it later without reopening scope
  confusion about the active launch gate.
• Acceptance criteria:
  • Base promotion checklist covers registry truth, custody, staged proof,
    runtime contract verification, and product-surface evidence
  • Base remains excluded from active blocker summaries until an explicit
    product decision promotes it
  • owner signoff is required before Base becomes an active launch lane
• Dependencies: PROD-001A
• Source docs: prediction-market-release-prep.md,
  tracking-document-map.md
• Suggested owner: release
• Blocker class: parked