fix(cli): improve message queue atomicity and add --wait-idle to tmux… #5476

Job	Run time
build-and-check	2m 26s
test-packages/agent-runtime	56s
test-.agents	39s
test-integration-packages/agent-runtime	40s
test-packages/internal	52s
test-sdk	44s
test-cli	1m 18s
test-integration-common	44s
test-web	50s
test-integration-packages/internal	40s
test-packages/billing	38s
test-integration-cli	42s
test-integration-web	46s
test-common	42s
test-integration-sdk	39s
test-integration-packages/billing	42s
test-integration-.agents	40s
	14m 38s

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