fix: invariant on global stream ending is upheld (#92) #26

Job	Run time
Build, Tag, and Push Image (examples/map-cat)	1m 44s
Build, Tag, and Push Image (examples/map-tickgen-serde)	1m 50s
Build, Tag, and Push Image (examples/mapt-event-time-filter)	2m 2s
Build, Tag, and Push Image (examples/reduce-counter)	1m 54s
Build, Tag, and Push Image (examples/sideinput)	2m 9s
Build, Tag, and Push Image (examples/sideinput/udf)	2m 10s
Build, Tag, and Push Image (examples/simple-source)	2m 8s
Build, Tag, and Push Image (examples/sink-log)	1m 47s
Build, Tag, and Push Image (examples/source-transformer-now)	1m 48s
Build, Tag, and Push Image (examples/batchmap-flatmap)	1m 49s
Build, Tag, and Push Image (examples/batchmap-cat)	1m 53s
	21m 14s

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