Route minimax through siliconflow of openrouter for now #5904

Job	Run time
build-and-check	3m 8s
test-integration-packages/billing	1m 5s
test-integration-packages/internal	1m 3s
test-integration-common	44s
test-common	50s
test-cli	1m 3s
test-sdk	50s
test-packages/internal	50s
test-packages/billing	59s
test-.agents	48s
test-integration-packages/agent-runtime	49s
test-integration-cli	49s
test-integration-sdk	1m 22s
test-packages/agent-runtime	44s
test-web	48s
test-integration-web	50s
	16m 42s

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