[RFC] Add BOLT 12 payer proof primitives #23029

Job	Run time
check_release	3m 5s
benchmark	17m 32s
check_docs	8m 48s
fuzz_sanity	11m 22s
rustfmt	17s
tor-connect	4m 40s
fuzz	1h 3m 32s
build-nostd / build (self-hosted, 1.75.0)	16m 16s
build-sync / build (self-hosted, 1.75.0)	25m 9s
ext-test	5m 10s
build-bindings / build (self-hosted, 1.75.0)	20m 1s
build-workspace / build (self-hosted, 1.75.0)	18m 59s
build-cfg-flags / build (self-hosted, 1.75.0)	15m 45s
build-features / build (self-hosted, 1.75.0)	28m 36s
linting	2m 26s
coverage	32m 13s
notify-failure	0s
	4h 33m 51s

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