OpenAI Agents Third-Party model providers #877

Job	Run time
build-lint-test (3.10, macos-arm)	5m 25s
build-lint-test (3.10, windows-latest)	6m 4s
build-lint-test (3.13, macos-arm)	5m 49s
build-lint-test (3.13, macos-intel)	8m 40s
build-lint-test (3.10, macos-intel)	6m 27s
build-lint-test (3.10, ubuntu-latest)	5m 22s
build-lint-test (3.13, ubuntu-latest)	8m 11s
build-lint-test (3.13, windows-latest)	11m 21s
	57m 19s

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