Resolve protocol version per request and expose it as ctx.protocol_ve… #2762

Job	Run time
checks / readme-snippets	12s
checks / pre-commit	41s
checks / test (3.13, locked, ubuntu-latest)	52s
checks / test (3.12, lowest-direct, windows-latest)	1m 40s
checks / test (3.11, locked, windows-latest)	1m 23s
checks / test (3.10, locked, windows-latest)	1m 30s
checks / test (3.11, locked, ubuntu-latest)	59s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.10, lowest-direct, ubuntu-latest)	58s
checks / test (3.11, lowest-direct, windows-latest)	1m 39s
checks / test (3.10, locked, ubuntu-latest)	59s
checks / test (3.10, lowest-direct, windows-latest)	1m 43s
checks / test (3.12, locked, windows-latest)	1m 43s
checks / test (3.14, lowest-direct, ubuntu-latest)	54s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 4s
checks / test (3.12, locked, ubuntu-latest)	1m 7s
checks / test (3.13, locked, windows-latest)	1m 35s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.13, lowest-direct, windows-latest)	1m 40s
checks / test (3.14, locked, ubuntu-latest)	2m 6s
checks / test (3.14, lowest-direct, windows-latest)	1m 24s
checks / test (3.14, locked, windows-latest)	2m 38s
all-green	3s
	29m 1s

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