fix(engine): deserialize PayloadAttributes.slot_number as hex string #10006

Job	Run time
check no_std	1m 1s
wasm-unknown	1m 45s
doctest	2m 18s
clippy	1m 16s
fmt	16s
docs	1m 36s
wasm-wasi	3m 0s
feature-checks	7m 23s
typos	6s
Analyze (actions)	39s
feature-propagation	1m 18s
deny / cargo deny check	24s
test ubuntu-latest stable --all-features	3m 55s
test windows-latest stable --all-features	7m 26s
test ubuntu-latest stable --no-default-features -F reqwest-rustls-tls	2m 58s
test ubuntu-latest nightly	3m 6s
test ubuntu-latest nightly --all-features	3m 32s
test ubuntu-latest 1.88	1m 44s
test ubuntu-latest stable	3m 9s
test windows-latest nightly --all-features	7m 45s
test windows-latest nightly --no-default-features -F reqwest-rustls-tls	6m 39s
test windows-latest stable --no-default-features -F reqwest-rustls-tls	6m 1s
test ubuntu-latest 1.88 --no-default-features -F reqwest-rustls-tls	1m 14s
test windows-latest nightly	5m 59s
test windows-latest 1.88 --no-default-features -F reqwest-rustls-tls	2m 57s
test ubuntu-latest nightly --no-default-features -F reqwest-rustls-tls	3m 5s
test windows-latest stable	5m 49s
test windows-latest 1.88	3m 41s
ci success	2s
	1h 30m 4s

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