Add ownership attribution and governance documentation

[Copilot]

Establishes Yaketh (@Kushmanmb) as repository owner with formal governance documentation and automated code review assignment.

Changes

GitHub Integration

• .github/CODEOWNERS - Assigns Yaketh (@Kushmanmb) to all files for automatic PR review requests
• .github/README.md - Attribution hub linking to governance docs

Governance Documentation

• OWNERSHIP.md - Ownership structure, responsibilities, contribution process
• PROOF_OF_WORK.md - Technical contributions: Etherscan API integration, test suite, Git documentation (264 lines)
• PROOF_OF_STAKE.md - Governance framework, stewardship commitments, long-term roadmap (301 lines)

Badge Integration

Updated existing docs with shield.io badges:

• README.md - 5 badges (Owner, Maintainer, License, PoW, PoS)
• ETHERSCAN_API.md, cherry-pick-demo.md - Owner/Author badges

All badges link to respective GitHub profiles or documentation files.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.etherscan.io
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node test.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

🔒 GitHub Advanced Security automatically protects Copilot coding agent pull requests. You can protect all pull requests by enabling Advanced Security for your repositories. Learn more about Advanced Security.