feat: add RedisEventStore for production SSE resumability #2254

Job	Run time
checks / pre-commit	29s
checks / readme-snippets	11s
checks / test (3.10, locked, windows-latest)	2m 27s
checks / test (3.10, locked, ubuntu-latest)	47s
checks / test (3.11, lowest-direct, windows-latest)	2m 30s
checks / test (3.12, lowest-direct, ubuntu-latest)	54s
checks / test (3.13, lowest-direct, windows-latest)	2m 36s
checks / test (3.12, locked, windows-latest)	3m 23s
checks / test (3.14, lowest-direct, windows-latest)	2m 27s
checks / test (3.14, locked, windows-latest)	2m 55s
checks / test (3.13, locked, windows-latest)	2m 29s
checks / test (3.11, lowest-direct, ubuntu-latest)	44s
checks / test (3.10, lowest-direct, ubuntu-latest)	46s
checks / test (3.10, lowest-direct, windows-latest)	2m 34s
checks / test (3.12, locked, ubuntu-latest)	53s
checks / test (3.12, lowest-direct, windows-latest)	3m 30s
checks / test (3.11, locked, ubuntu-latest)	48s
checks / test (3.13, lowest-direct, ubuntu-latest)	43s
checks / test (3.14, locked, ubuntu-latest)	1m 57s
checks / test (3.11, locked, windows-latest)	2m 34s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 13s
checks / test (3.13, locked, ubuntu-latest)	46s
all-green	4s
	37m 40s

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