feat: cache etag support #15390

Job	Run time
dependency-review	10s
Lint	42s
Fuzzing	3m 38s
Test TypeScript types	40s
Test with Node.js 20 compiled --without-intl	2m 24s
Test with Node.js 22 compiled --without-intl	2m 42s
Test with Node.js 23 compiled --without-intl	2m 30s
test (18, ubuntu-latest) / Test with Node.js 18 on ubuntu-latest	1m 52s
test (18, macos-latest) / Test with Node.js 18 on macos-latest	2m 16s
test (18, windows-latest) / Test with Node.js 18 on windows-latest	2m 13s
test (20, macos-latest) / Test with Node.js 20 on macos-latest	2m 6s
test (20, ubuntu-latest) / Test with Node.js 20 on ubuntu-latest	1m 34s
test (20, windows-latest) / Test with Node.js 20 on windows-latest	2m 15s
test (21, macos-latest) / Test with Node.js 21 on macos-latest	2m 11s
test (21, ubuntu-latest) / Test with Node.js 21 on ubuntu-latest	1m 39s
test (21, windows-latest) / Test with Node.js 21 on windows-latest	2m 17s
test (22, macos-latest) / Test with Node.js 22 on macos-latest	2m 4s
test (22, ubuntu-latest) / Test with Node.js 22 on ubuntu-latest	1m 43s
test (22, windows-latest) / Test with Node.js 22 on windows-latest	2m 56s
test (23, macos-latest) / Test with Node.js 23 on macos-latest	2m 0s
test (23, ubuntu-latest) / Test with Node.js 23 on ubuntu-latest	1m 41s
test (23, windows-latest) / Test with Node.js 23 on windows-latest	2m 12s
automerge	0s
	43m 45s

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