chore(worker rpc): improve error throwing

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@mina-js/accounts

npm i https://pkg.pr.new/palladians/mina-js/@mina-js/accounts@6

@mina-js/providers

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@mina-js/connect

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@mina-js/klesia-sdk

npm i https://pkg.pr.new/palladians/mina-js/@mina-js/klesia-sdk@6

@mina-js/utils

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commit: 4eb079d