Handle nested AI retry errors #6614

Job	Run time
build-and-check	2m 48s
test-integration-packages/internal	1m 2s
test-integration-sdk	1m 21s
test-packages/agent-runtime	42s
test-integration-common	47s
test-integration-web	53s
test-integration-packages/agent-runtime	46s
test-sdk	43s
test-integration-packages/billing	1m 2s
test-packages/internal	44s
test-web	55s
test-packages/billing	41s
test-integration-cli	54s
test-.agents	48s
test-common	46s
test-cli	1m 0s
	15m 52s

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