feat: add support for Python 3.13 #4511

Job	Run time
mypy	1m 3s
pyright	40s
slotscheck	19s
validate	18s
Test server integration (uvicorn<0.27.0)	45s
Test Minimal Pydantic 1 application	16s
test-platform-compat	0s
Test server integration (uvicorn>=0.27.0)	51s
Test Minimal Application with Base Dependencies	14s
test (3.11) / test	1m 54s
test (3.10) / test	1m 53s
test (3.12) / test	2m 10s
test (3.13) / test	1m 57s
test (3.8) / test	2m 12s
test (3.9) / test	1m 55s
build-docs	2m 25s
codeql	0s
upload-test-coverage	0s
sonar	0s
	18m 52s

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