lint

feat: improve sequencer metrics #1607

Job	Run time
zepter	52s
docs	4m 20s
no_std (wasm, wasm32-unknown-unknown, scroll-engine,scroll-wire,rollup-node,scroll-network,rollup...	38s
codespell	14s
clippy	4m 24s
features	12m 24s
check-toml	7s
fmt	15s
udeps	4m 41s
no_std (riscv, riscv32imac-unknown-none-elf, scroll-engine,scroll-wire,rollup-node,scroll-network...	34s
	28m 29s

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