Add history chat deletion (#619) #6495

Job	Run time
build-and-check	3m 10s
test-integration-packages/billing	1m 12s
test-integration-sdk	1m 16s
test-integration-cli	49s
test-integration-web	42s
test-integration-common	43s
test-common	53s
test-integration-packages/internal	1m 16s
test-web	1m 10s
test-sdk	52s
test-packages/billing	52s
test-.agents	42s
test-packages/agent-runtime	44s
test-cli	50s
test-integration-packages/agent-runtime	54s
test-packages/internal	53s
	16m 58s

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