feat(core): new base middleware #4819

Job	Run time
pyright	39s
mypy	1m 4s
slotscheck	20s
Test server integration (uvicorn<0.27.0)	40s
Test Minimal Application with Base Dependencies	18s
Test server integration (uvicorn>=0.27.0)	43s
Test Minimal Pydantic 1 application	30s
test-platform-compat	0s
validate	24s
test (3.10) / test	1m 44s
test (3.11) / test	1m 46s
test (3.12) / test	3m 8s
test (3.13) / test	1m 56s
test (3.8) / test	2m 43s
test (3.9) / test	1m 57s
build-docs	1m 22s
codeql	2m 10s
upload-test-coverage	22s
sonar	1m 16s
	23m 2s

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