Fix: Escape on ask_user form now interrupts assistant stream #6068

Job	Run time
build-and-check	3m 5s
test-integration-packages/internal	1m 15s
test-integration-packages/billing	1m 25s
test-integration-web	40s
test-integration-sdk	1m 11s
test-integration-packages/agent-runtime	43s
test-integration-cli	46s
test-integration-common	41s
test-packages/billing	50s
test-packages/internal	46s
test-common	43s
test-.agents	49s
test-cli	56s
test-sdk	44s
test-web	1m 23s
test-packages/agent-runtime	47s
	16m 44s

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