Cache compiled output-schema validators on ClientSession #3664

Job	Run time
checks / docs	1m 3s
checks / readme-snippets	11s
checks / pre-commit	54s
checks / test (3.11, lowest-direct, windows-latest)	1m 57s
checks / test (3.14, lowest-direct, windows-latest)	1m 58s
checks / test (3.13, lowest-direct, windows-latest)	1m 50s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 28s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 21s
checks / test (3.13, locked, ubuntu-latest)	1m 7s
checks / test (3.13, lowest-direct, ubuntu-latest)	55s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 30s
checks / test (3.11, locked, windows-latest)	1m 56s
checks / test (3.13, locked, windows-latest)	1m 51s
checks / test (3.12, lowest-direct, windows-latest)	1m 50s
checks / test (3.10, locked, ubuntu-latest)	1m 27s
checks / test (3.10, lowest-direct, windows-latest)	1m 55s
checks / test (3.11, locked, ubuntu-latest)	1m 30s
checks / test (3.12, locked, ubuntu-latest)	1m 40s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 21s
checks / test (3.14, locked, windows-latest)	2m 0s
checks / test (3.14, locked, ubuntu-latest)	1m 22s
checks / test (3.12, locked, windows-latest)	2m 24s
checks / test (3.10, locked, windows-latest)	2m 7s
all-green	3s
	35m 40s

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