fix: return 400 instead of 500 for idempotency key reuse with different body #775

	name: Benchmark
	on:
	workflow_dispatch:
	pull_request:
	types: [ assigned, opened, synchronize, reopened, labeled ]

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true

	jobs:
	Benchmark:
	runs-on: "github-001"
	if: contains(github.event.pull_request.labels.*.name, 'benchmarks') \|\| github.ref == 'refs/heads/main'
	steps:
	- uses: 'actions/checkout@v4'
	with:
	fetch-depth: 0
	- run: go build -o /tmp/ledger ./
	- run: echo "running actions as ${USER}"
	- run: >
	/tmp/ledger serve
	--postgres-uri=postgres://formance:formance@127.0.0.1/ledger
	--postgres-conn-max-idle-time=120s
	--postgres-max-open-conns=500
	--postgres-max-idle-conns=100
	--experimental-features
	--otel-metrics-keep-in-memory &
	- run: >
	earthly
	--allow-privileged
	${{ contains(github.event.pull_request.labels.*.name, 'no-cache') && '--no-cache' \|\| '' }}
	./test/performance+run --args="-benchtime 10s --ledger.url=http://localhost:3068 --parallelism=5" --locally=yes
	- run: >
	earthly
	--allow-privileged
	${{ contains(github.event.pull_request.labels.*.name, 'no-cache') && '--no-cache' \|\| '' }}
	./test/performance+generate-graphs
	- run: kill -9 $(ps aux \| grep "ledger serve"\| grep -v "grep" \| awk '{print $2}')
	if: always()
	- uses: actions/upload-artifact@v4
	with:
	name: graphs
	path: test/performance/report

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