Add read tool and DeepSeek reviewer #6437

Job	Run time
build-and-check	3m 13s
test-integration-packages/billing	1m 25s
test-integration-packages/internal	1m 16s
test-integration-cli	45s
test-integration-packages/agent-runtime	46s
test-integration-sdk	1m 11s
test-integration-common	43s
test-integration-web	45s
test-.agents	51s
test-packages/billing	40s
test-common	45s
test-sdk	53s
test-cli	56s
test-web	1m 18s
test-packages/internal	50s
test-packages/agent-runtime	47s
	17m 4s

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