Use Kimi K2.6 for free and lite #6318

Job	Run time
build-and-check	2m 43s
test-integration-packages/internal	1m 12s
test-integration-packages/billing	1m 2s
test-integration-web	43s
test-packages/agent-runtime	45s
test-integration-sdk	1m 22s
test-.agents	47s
test-packages/billing	48s
test-cli	54s
test-integration-common	53s
test-integration-cli	44s
test-integration-packages/agent-runtime	45s
test-common	41s
test-web	2m 26s
test-sdk	54s
test-packages/internal	48s
	17m 27s

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