Log message history and system prompt for errors so we can debug them #5277

Job	Run time
build-and-check	2m 32s
test-cli	1m 18s
test-packages/agent-runtime	1m 2s
test-.agents	40s
test-integration-cli	37s
test-integration-packages/internal	39s
test-common	39s
test-integration-common	39s
test-packages/internal	45s
test-packages/billing	37s
test-web	43s
test-integration-packages/agent-runtime	41s
test-integration-.agents	37s
test-integration-packages/billing	45s
test-sdk	44s
test-integration-sdk	40s
test-integration-web	41s
	14m 19s

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