fix: attestation idempotency - #51
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bajtos
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Aug 3, 2026
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attestation/signer.go'sSign()builds the/ucan/attest/proofinvocation withoutinvocation.WithNoNonce()orWithNoExpiration(), so every attestation gets a random 16-byte nonce and a 30-second exp — where the spec requires an empty nonce and null exp.