enable prompt caching #546

Job	Run time
vars	1s
tests / e2e-test (macos-latest)	14m 27s
tests / e2e-test (ubuntu-latest)	8m 28s
docker / docker	5m 45s
electron / electron (macos-latest)	15m 39s
electron / electron (ubuntu-latest)	9m 34s
tests / test (macos-latest)	13m 15s
electron / electron (windows-latest)	20m 5s
tests / test (ubuntu-latest)	12m 38s
sites / Deploy sites	7m 38s
tests / api-e2e-test	14m 2s
	2h 1m 32s

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