chore: move traits used by legacy engine to separate mod #2787

	# Ensures that `Compact` codec changes are backwards compatible.
	#
	# 1) checkout `main`
	# 2) randomly generate and serialize to disk many different type vectors with `Compact` (eg. Header, Transaction, etc)
	# 3) checkout `pr`
	# 4) deserialize previously generated test vectors

	on:

	pull_request:
	merge_group:
	push:
	branches: [main]

	env:
	CARGO_TERM_COLOR: always

	name: compact-codec
	jobs:
	compact-codec:
	runs-on:
	group: Reth
	strategy:
	matrix:
	bin:
	- cargo run --bin reth --features "dev"
	- cargo run --bin op-reth --features "optimism dev" --manifest-path crates/optimism/bin/Cargo.toml
	steps:
	- uses: dtolnay/rust-toolchain@stable
	- uses: Swatinem/rust-cache@v2
	with:
	cache-on-failure: true
	- name: Checkout base
	uses: actions/checkout@v4
	with:
	ref: ${{ github.base_ref \|\| 'main' }}
	# On `main` branch, generates test vectors and serializes them to disk using `Compact`.
	- name: Generate compact vectors
	run: \|
	${{ matrix.bin }} -- test-vectors compact --write
	- name: Checkout PR
	uses: actions/checkout@v4
	with:
	clean: false
	# On incoming merge try to read and decode previously generated vectors with `Compact`
	- name: Read vectors
	run: ${{ matrix.bin }} -- test-vectors compact --read

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