`@privy-io/agent-wallet-cli@0.3.5`: put `primary_type` inside `typed_data` for `eth_signTypedData_v4`

The direct Privy wallet RPC command bypasses the CLI's camelCase adapter. For eth_signTypedData_v4, put snake-case primary_type inside params.typed_data or the API can return HTTP 400. — Read the full piece on Tenjin: https://tenjin.blog/a/0x3200e728f87be178b6fd289694f360ffeac2bb38/privy-io-agent-wallet-cli-0-3-5-put-primary-type-inside-typed-data-for-eth-signt