feat: WebSocket send stream (#3894) #2

Job	Run time
slotscheck	16s
mypy	57s
pyright	36s
Test Minimal Application with Base Dependencies	17s
Test server integration (uvicorn<0.27.0)	41s
Test Minimal Pydantic 1 application	17s
Test server integration (uvicorn>=0.27.0)	47s
validate	52s
test (3.11) / test	1m 35s
test (3.10) / test	1m 55s
test (3.8) / test	2m 45s
test (3.12) / test	3m 20s
test (3.9) / test	1m 55s
test-platform-compat (macos-latest) / test	1m 17s
test-platform-compat (windows-latest) / test	2m 9s
build-docs	0s
upload-test-coverage	14s
codeql	2m 2s
sonar	0s
	21m 55s

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