feat: WebSocket send stream (#3894) #4472

Job	Run time
validate	18s
mypy	1m 2s
pyright	46s
slotscheck	20s
Test server integration (uvicorn<0.27.0)	39s
Test Minimal Application with Base Dependencies	13s
Test server integration (uvicorn>=0.27.0)	43s
Test Minimal Pydantic 1 application	17s
test (3.10) / test	2m 28s
test (3.11) / test	1m 37s
test (3.12) / test	3m 56s
test (3.8) / test	3m 8s
test (3.9) / test	2m 0s
test-platform-compat (macos-latest) / test	1m 23s
test-platform-compat (windows-latest) / test	2m 19s
build-docs	0s
upload-test-coverage	19s
codeql	2m 16s
sonar	1m 49s
	25m 33s

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