fix: implement JCS cart-to-payment mandate binding per RFC 8785#253

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chopmob-cloud wants to merge 3 commits intogoogle-agentic-commerce:mainfrom

chopmob-cloud:fix/jcs-cart-payment-binding-v3

Commits on May 1, 2026

fix: implement JCS cart-to-payment mandate binding per RFC 8785
chopmob-cloud
committed
fix(jcs): use American English spellings and fix MD030 list markers
chopmob-cloud
committed
fix(spec): convert broken reference link to inline link (MD052)
chopmob-cloud
committed