duplicate detection via change store #514

Job	Run time
Lint	1m 5s
Tidy	1m 23s
E2E Integration Test	2m 24s
Gateway Integration Test	1m 36s
Build and Unit Test	2m 1s
Queue Extension Test	1m 12s
Storage Extension Test	1m 11s
Consumer Integration Test	1m 10s
Counter Extension Test	1m 9s
Orchestrator Integration Test	1m 32s
Required Checks	4s
	14m 47s

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