duplicate detection via change store #481

Job	Run time
Lint	1m 6s
Orchestrator Integration Test	1m 41s
Tidy	1m 27s
E2E Integration Test	1m 40s
Gateway Integration Test	1m 42s
Counter Extension Test	1m 21s
Build and Unit Test	1m 55s
Consumer Integration Test	1m 17s
Queue Extension Test	1m 23s
Storage Extension Test	1m 54s
Required Checks	3s
	15m 29s

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