Fix Data Machine bundle dry-run passthrough

[chubes4]

Summary

• Forward datamachine_bundle.dry_run from WP Codebox into the datamachine/run-agent-bundle ability input.
• Expand the WordPress smoke to assert the dry-run flag survives recipe serialization.

Verification

• npm run build
• npm run wordpress-plugin-smoke
• git diff --check
• Real Homeboy -> WP Codebox -> Data Machine dry-run E2E passed with success: true and session.status: completed.

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Diagnosed the E2E contract failure, drafted the passthrough fix, and ran verification. Chris remains responsible for review and merge.