Add sglang router minimal support #5731

Job	Run time
compute-version	4s
build-docs	0s
build-artifacts / runner-test (ubuntu-latest)	35s
build-artifacts / gateway-build	24s
build-artifacts / runner-test (macos-latest)	45s
build-artifacts / frontend-build	8s
build-artifacts / code-lint	49s
build-artifacts / python-build	29s
build-artifacts / generate-json-schema	16s
build-artifacts / python-test (macos-latest, 3.10)	2m 16s
build-artifacts / python-test (macos-latest, 3.12)	2m 21s
build-artifacts / python-test (ubuntu-latest, 3.10)	4m 12s
build-artifacts / python-test (macos-latest, 3.11)	2m 27s
build-artifacts / python-test (macos-latest, 3.13)	3m 40s
build-artifacts / python-test (macos-latest, 3.9)	2m 23s
build-artifacts / python-test (ubuntu-latest, 3.9)	4m 9s
build-artifacts / python-test (ubuntu-latest, 3.13)	3m 42s
build-artifacts / python-test (windows-latest, 3.9)	1m 47s
build-artifacts / python-test (ubuntu-latest, 3.11)	3m 49s
build-artifacts / python-test (windows-latest, 3.10)	2m 0s
build-artifacts / python-test (ubuntu-latest, 3.12)	3m 58s
build-artifacts / python-test (windows-latest, 3.11)	1m 55s
build-artifacts / python-test (windows-latest, 3.12)	2m 25s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	26s
build-artifacts / python-test (windows-latest, 3.13)	2m 12s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	26s
upload-pre-pypi-artifacts	0s
upload-post-pypi-artifacts	0s
	47m 38s

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