All 31 payment operation display names now lead with their domain prefix
(EMV, DUKPT, PIN Block, PAN, etc.) so they sort and scan by topic in the
UI list. 8 upstream CyberChef ops (AES Encrypt/Decrypt, Triple DES,
AES Key Wrap/Unwrap, HMAC, CMAC) removed from the Payments category.
Updated: op this.name fields, Categories.json, Payment.mjs tests,
PAYMENT_RECIPES.md, AWS_PAYMENT_CRYPTOGRAPHY_RECIPES.md, AGENTS.md.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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