(ABANDONED, replaced by PR 1212) fix for SIG_ALL and P2PK, ensuring it works with swap and melt. Also, after the locktime, support SIG_ALL with refund keys#1195

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SatsAndSports wants to merge 12 commits intocashubtc:mainfrom

SatsAndSports:skip_sig_all_in_verify_proofs

Commits on Oct 19, 2025

verify_p2pk, taking a very differnet approach. Trying to keep locktime working. This commit adds of of tracing, and skips the signature verification for SIG_ALL
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when SIG_ALL, skip verify_p2pk. SIG_ALL is handled elsewhere
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replace 'enforce_sig_flag' as it wasn't really being used. 'has_at_least_one_sig_all_proof' is a better-named alternative
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get_sig_all_required_sigs was duplicated. Now there is one function, and it has been overhauled to be aware of locktime. If the locktime has passed, then it is based on refund keys instead of the '…
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rename verify_p2pk to verify_p2pk_for_SIG_INPUT
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Fix the name of that function, making sure all tests pass
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Remove the tracing that we added while debugging
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Add that whitespace back in, as I don't want to change whitespace unnecessarily
SatsAndSports
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