Estimate waiting room wait as 24 seconds per spot ahead (#516) #6143

Job	Run time
build-and-check	3m 13s
test-integration-packages/internal	1m 10s
test-integration-packages/billing	1m 8s
test-integration-packages/agent-runtime	46s
test-integration-web	38s
test-integration-common	43s
test-integration-cli	38s
test-integration-sdk	1m 6s
test-packages/internal	48s
test-cli	53s
test-web	1m 33s
test-sdk	48s
test-.agents	47s
test-packages/agent-runtime	44s
test-packages/billing	45s
test-common	43s
	16m 23s

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