feat: add RedisEventStore for production SSE resumability #2264

Job	Run time
checks / pre-commit	32s
checks / readme-snippets	12s
checks / test (3.12, locked, ubuntu-latest)	53s
checks / test (3.10, locked, ubuntu-latest)	49s
checks / test (3.13, lowest-direct, ubuntu-latest)	57s
checks / test (3.12, lowest-direct, windows-latest)	3m 46s
checks / test (3.11, locked, windows-latest)	2m 36s
checks / test (3.10, lowest-direct, windows-latest)	2m 27s
checks / test (3.11, lowest-direct, ubuntu-latest)	59s
checks / test (3.11, lowest-direct, windows-latest)	2m 37s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 20s
checks / test (3.13, locked, windows-latest)	2m 21s
checks / test (3.13, lowest-direct, windows-latest)	2m 42s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.12, locked, windows-latest)	3m 16s
checks / test (3.14, locked, windows-latest)	3m 41s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.12, lowest-direct, ubuntu-latest)	59s
checks / test (3.11, locked, ubuntu-latest)	54s
checks / test (3.10, locked, windows-latest)	2m 15s
checks / test (3.14, lowest-direct, windows-latest)	2m 45s
checks / test (3.14, locked, ubuntu-latest)	2m 15s
all-green	5s
	40m 7s

Provide feedback