feat: WebSocket send stream #4468

Job	Run time
pyright	40s
mypy	1m 0s
slotscheck	21s
Test server integration (uvicorn<0.27.0)	47s
Test server integration (uvicorn>=0.27.0)	43s
validate	23s
Test Minimal Application with Base Dependencies	12s
Test Minimal Pydantic 1 application	12s
test-platform-compat	0s
test (3.10) / test	1m 46s
test (3.11) / test	1m 30s
test (3.12) / test	2m 5s
test (3.8) / test	2m 5s
test (3.9) / test	1m 49s
build-docs	0s
codeql	0s
sonar	0s
upload-test-coverage	0s
	13m 33s

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