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ci-cost #61

	# =============================================================================
	# Cost-regression CI (D-143) — OUT-OF-BAND, NON-BLOCKING
	# -----------------------------------------------------------------------------
	# Runs the cost-regression harness on a schedule and on demand only — never on
	# push/pull_request — so it cannot gate a PR or the v1.0.0-rc. It enforces the
	# hard 10 s per-Collect ceiling (D-143) and reports mean throughput vs the
	# optional committed baseline. Per D-143 the strict >2% throughput gate becomes
	# a PR check at GA once thresholds are calibrated on stable infra; until then it
	# is advisory here. Build-pipeline only (D-148).
	# =============================================================================

	name: ci-cost

	on:
	schedule:
	- cron: '17 4 * * *' # nightly, out-of-band
	workflow_dispatch:
	inputs:
	iterations:
	description: 'Timed Collect iterations (after warm-up)'
	required: false
	default: '20'

	permissions:
	contents: read

	concurrency:
	group: ci-cost
	cancel-in-progress: true

	jobs:
	cost:
	name: Cost regression (out-of-band, non-blocking)
	runs-on: ubuntu-latest
	timeout-minutes: 30
	env:
	ITERATIONS: ${{ github.event.inputs.iterations \|\| '20' }}
	steps:
	- name: Check out repository
	uses: actions/checkout@v4

	- name: Run cost-regression harness (SQL Server 2022)
	run: \|
	set -euo pipefail
	ITERS="${ITERATIONS}"
	[[ "${ITERS}" =~ ^[0-9]+$ ]] \|\| ITERS=20
	bash tests/perf/run-cost-regression.sh mcr.microsoft.com/mssql/server:2022-latest "${ITERS}"