duplicate detection via change store #515

Job	Run time
Tidy	1m 25s
Gateway Integration Test	1m 26s
Storage Extension Test	1m 13s
Counter Extension Test	1m 17s
Consumer Integration Test	1m 12s
E2E Integration Test	2m 16s
Queue Extension Test	1m 14s
Lint	56s
Orchestrator Integration Test	1m 18s
Build and Unit Test	1m 58s
Required Checks	5s
	14m 20s

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