feat: add RedisEventStore for production SSE resumability #2263

Job	Run time
checks / readme-snippets	10s
checks / pre-commit	35s
checks / test (3.11, locked, ubuntu-latest)	52s
checks / test (3.10, lowest-direct, windows-latest)	3m 2s
checks / test (3.12, locked, ubuntu-latest)	50s
checks / test (3.10, lowest-direct, ubuntu-latest)	57s
checks / test (3.13, locked, ubuntu-latest)	50s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 16s
checks / test (3.13, lowest-direct, windows-latest)	2m 36s
checks / test (3.11, lowest-direct, windows-latest)	2m 40s
checks / test (3.11, locked, windows-latest)	2m 26s
checks / test (3.12, locked, windows-latest)	3m 14s
checks / test (3.13, locked, windows-latest)	2m 23s
checks / test (3.12, lowest-direct, windows-latest)	3m 49s
checks / test (3.11, lowest-direct, ubuntu-latest)	56s
checks / test (3.14, locked, ubuntu-latest)	2m 15s
checks / test (3.10, locked, ubuntu-latest)	52s
checks / test (3.10, locked, windows-latest)	2m 27s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.14, lowest-direct, windows-latest)	2m 31s
checks / test (3.14, locked, windows-latest)	3m 56s
checks / test (3.13, lowest-direct, ubuntu-latest)	54s
all-green	4s
	40m 37s

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