feat(core): new base middleware [RFC] #4796

Job	Run time
pyright	45s
slotscheck	22s
mypy	1m 8s
Test server integration (uvicorn<0.27.0)	49s
Test server integration (uvicorn>=0.27.0)	42s
Test Minimal Application with Base Dependencies	21s
test-platform-compat	0s
Test Minimal Pydantic 1 application	20s
validate	45s
test (3.10) / test	1m 54s
test (3.11) / test	1m 42s
test (3.12) / test	3m 9s
test (3.13) / test	2m 36s
test (3.8) / test	2m 47s
test (3.9) / test	2m 2s
build-docs	1m 19s
upload-test-coverage	17s
codeql	2m 12s
sonar	1m 3s
	24m 13s

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