chore: add block 4 #4

Job	Run time
Checkpoint state / block-2-start	46s
Maven build and root tests	1m 12s
Checkpoint state / block-3-complete	1m 11s
Checkpoint state / block-2-complete	45s
Checkpoint state / block-3-start	45s
Container build and publish	1m 5s
	5m 44s

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