fix: reject initialize protocol version conflicts #2553

Job	Run time
checks / readme-snippets	14s
checks / pre-commit	35s
checks / test (3.11, lowest-direct, ubuntu-latest)	54s
checks / test (3.10, lowest-direct, windows-latest)	1m 11s
checks / test (3.10, locked, windows-latest)	1m 12s
checks / test (3.10, locked, ubuntu-latest)	55s
checks / test (3.10, lowest-direct, ubuntu-latest)	50s
checks / test (3.12, lowest-direct, windows-latest)	1m 40s
checks / test (3.11, locked, windows-latest)	1m 15s
checks / test (3.13, lowest-direct, windows-latest)	1m 44s
checks / test (3.13, lowest-direct, ubuntu-latest)	48s
checks / test (3.11, locked, ubuntu-latest)	49s
checks / test (3.11, lowest-direct, windows-latest)	1m 10s
checks / test (3.12, locked, ubuntu-latest)	55s
checks / test (3.12, lowest-direct, ubuntu-latest)	53s
checks / test (3.12, locked, windows-latest)	1m 17s
checks / test (3.14, lowest-direct, windows-latest)	1m 53s
checks / test (3.14, locked, windows-latest)	2m 39s
checks / test (3.13, locked, windows-latest)	1m 32s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.14, lowest-direct, ubuntu-latest)	47s
checks / test (3.14, locked, ubuntu-latest)	1m 15s
all-green	2s
	25m 15s

Provide feedback