DanGould / rust-payjoin / 22035282125

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Clear V1 payload from memory after first read

V1 payloads are plaintext PSBTs held in memory. Previously the payload
persisted until the sender timed out or the receiver responded. Now the
payload is take()n on first read — subsequent reads return None while
the oneshot response channel remains alive for the receiver's reply.

This minimizes the window during which plaintext transaction data
resides in process memory.

33 of 34 new or added lines in 1 file covered. (97.06%)

10427 of 12711 relevant lines covered (82.03%)

415.13 hits per line