[PRMT-4727] Added FailureReason enumeration.

Signed-off-by: martin-nhs <[email protected]>

src/main/java/uk/nhs/prm/repo/ehrtransferservice/database/enumeration/FailureReason.java

@@ -0,0 +1,11 @@
+package uk.nhs.prm.repo.ehrtransferservice.database.enumeration;
+
+public enum FailureReason {
+    NEGATIVE_ACKNOWLEDGEMENT_RECEIVED("INBOUND:negative_acknowledgement_received");
+
+    public final String reason;
+
+    FailureReason(String reason) {
+        this.reason = reason;
+    }
+}