Add DeepSeek V4 model docs (#3823) #6973

Job	Run time
compute-version	3s
build-docs / build-docs	1m 28s
build-artifacts / gateway-build	15s
build-artifacts / code-lint	45s
build-artifacts / frontend-build	8s
build-artifacts / runner-test (ubuntu-latest)	1m 9s
build-artifacts / runner-test (macos-latest)	53s
build-artifacts / python-build	19s
build-artifacts / generate-json-schema	23s
build-artifacts / python-test (ubuntu-latest, 3.11)	4m 59s
build-artifacts / python-test (macos-latest, 3.12)	3m 36s
build-artifacts / python-test (macos-latest, 3.11)	3m 2s
build-artifacts / python-test (macos-latest, 3.13)	3m 51s
build-artifacts / python-test (ubuntu-latest, 3.10)	4m 46s
build-artifacts / python-test (ubuntu-latest, 3.12)	5m 11s
build-artifacts / python-test (windows-latest, 3.13)	4m 18s
build-artifacts / python-test (windows-latest, 3.11)	2m 3s
build-artifacts / python-test (macos-latest, 3.10)	3m 32s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 37s
build-artifacts / python-test (windows-latest, 3.12)	2m 6s
build-artifacts / python-test (windows-latest, 3.10)	2m 4s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	33s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	24s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	19s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	24s
	51m 8s

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