Add Claim Boundary Harness

[qimen039-code]

Adds Claim Boundary Harness to the Agent infrastructure section.

Why it fits this list:

• it is a terminal/script-oriented governance harness for CLI coding-agent workflows;
• it covers claim verification, project-scoped memory lanes, R0-R5 risk receipts, and adapter playbooks for Codex, Claude Code, and WorkBuddy-style hooks;
• it is listed as a reference harness, not as a standalone agent runtime.

Project: https://github.com/qimen039-code/claim-boundary-harness
Design note: https://github.com/qimen039-code/claim-boundary-harness/blob/main/docs/articles/claim-boundary-harness-design.md