refactor: Standardize on JSON Schema Draft 2020-12 to validate stream schemas #6646

Job	Run time
Test on 3.8 (tests) / ubuntu-latest / SQLAlchemy: 2	31s
Test on 3.9 (tests) / ubuntu-latest / SQLAlchemy: 2	31s
Test on 3.10 (tests) / ubuntu-latest / SQLAlchemy: 2	30s
Test on 3.11 (tests) / ubuntu-latest / SQLAlchemy: 2	27s
Test on 3.12 (tests) / ubuntu-latest / SQLAlchemy: 2	32s
Test on 3.13 (tests) / ubuntu-latest / SQLAlchemy: 2	45s
Test on 3.8 (tests) / macos-latest / SQLAlchemy: 2	1m 6s
Test on 3.9 (tests) / macos-latest / SQLAlchemy: 2	37s
Test on 3.10 (tests) / macos-latest / SQLAlchemy: 2	33s
Test on 3.11 (tests) / macos-latest / SQLAlchemy: 2	42s
External Tests	1m 31s
Test on 3.12 (tests) / macos-latest / SQLAlchemy: 2	34s
Test on 3.13 (tests) / macos-latest / SQLAlchemy: 2	55s
Test on 3.8 (tests) / windows-latest / SQLAlchemy: 2	1m 45s
Test on 3.9 (tests) / windows-latest / SQLAlchemy: 2	1m 45s
Test on 3.10 (tests) / windows-latest / SQLAlchemy: 2	2m 5s
Test on 3.11 (tests) / windows-latest / SQLAlchemy: 2	1m 31s
Test on 3.12 (tests) / windows-latest / SQLAlchemy: 2	1m 41s
Test on 3.13 (tests) / windows-latest / SQLAlchemy: 2	2m 4s
Test on 3.13 (tests) / ubuntu-latest / SQLAlchemy: 1	41s
Test on 3.13 (doctest) / ubuntu-latest / SQLAlchemy: 2	26s
Test on 3.12 (mypy) / ubuntu-latest / SQLAlchemy: 2	34s
Test on 3.12 (deps) / ubuntu-latest / SQLAlchemy: 2	17s
Coverage	19s
	22m 22s

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