Reanalyze: refactor DCE to pure pipeline architecture #9022

Job	Run time
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	3m 8s
build-compiler (windows-2025, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu, .exe)	5m 50s
build-compiler (macos-15, 5.3.0, true, darwin-arm64, aarch64-apple-darwin)	6m 10s
build-compiler (macos-15-intel, 5.3.0, true, darwin-x64, x86_64-apple-darwin)	10m 53s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	4m 0s
build-compiler (ubuntu-24.04, ocaml-variants.4.14.2+options,ocaml-option-static, linux-x64, x86_6...	2m 49s
api-docs	1m 31s
pkg-pr-new	1m 1s
test-installation-pnpm (macos-15)	26s
test-installation-pnpm (macos-15-intel)	39s
test-installation-pnpm (windows-2025)	1m 9s
test-installation-pnpm (ubuntu-24.04)	12s
test-installation-npm (macos-15-intel)	27s
test-installation-npm (ubuntu-24.04)	14s
test-installation-npm (macos-15)	16s
test-installation-npm (windows-2025)	1m 1s
test-installation-npm (ubuntu-24.04-arm)	18s
test-installation-pnpm (ubuntu-24.04-arm)	19s
test-integration-rewatch (ubuntu-24.04-arm)	1m 13s
test-integration-rewatch (macos-15-intel)	2m 58s
test-integration-rewatch (macos-15)	1m 31s
test-integration-rewatch (ubuntu-24.04)	1m 22s
test-integration-rewatch (windows-2025)	3m 14s
publish	-1s
	50m 40s

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