OpenAI Agents Third-Party model providers #875

Job	Run time
build-lint-test (3.10, ubuntu-latest)	14s
build-lint-test (3.10, windows-latest)	23s
build-lint-test (3.10, macos-arm)	13s
build-lint-test (3.13, windows-latest)	24s
build-lint-test (3.13, ubuntu-latest)	30s
build-lint-test (3.10, macos-intel)	23s
build-lint-test (3.13, macos-arm)	30s
build-lint-test (3.13, macos-intel)	11s
	2m 48s

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