Check that RR isn't already present before attempting to merge with eICR #2574

Job	Run time
code-check-python	29s
postgres-tests	1m 16s
test-node-containers	1m 9s
ensure-clean-notebooks	7s
unit-test-phdi-building-blocks-lib	2m 6s
list-containers / list-integration-test-directories	10s
list-containers / list-containers	12s
integration-test-python-containers (validation)	3m 43s
unit-test-python-containers (alerts)	1m 52s
integration-test-python-containers (orchestration)	12m 52s
unit-test-python-containers (fhir-converter)	1m 48s
integration-test-python-containers (fhir-converter)	6m 46s
unit-test-python-containers (ingestion)	1m 35s
unit-test-python-containers (message-parser)	2m 0s
unit-test-python-containers (orchestration)	1m 44s
unit-test-python-containers (record-linkage)	2m 15s
unit-test-python-containers (tabulation)	1m 48s
unit-test-python-containers (validation)	1m 43s
	43m 35s

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