fix!: cookie string parser #3796

Job	Run time
pyright	1m 20s
slotscheck	47s
mypy	1m 25s
Test server integration (uvicorn<0.27.0)	1m 4s
validate	11s
Test server integration (uvicorn>=0.27.0)	1m 8s
Test Minimal Pydantic 1 application	50s
Test Minimal Application with Base Dependencies	48s
test-platform-compat	0s
test (3.11) / test	1m 57s
test (3.10) / test	2m 0s
test (3.12) / test	2m 59s
test (3.8) / test	2m 28s
test (3.9) / test	1m 54s
build-docs	2m 56s
upload-test-coverage	15s
codeql	2m 43s
sonar	0s
	24m 45s

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