fix: prevent duplicate events for drgs and decisions

When writing the records after deploying a new DRG we would iterate over all the drgs and decisions in the DeploymentRecord. New drgs and decisions get gradually appended to the DeploymentRecord for each resource that's being processed. Since we iterate over this for every resource, it causes the same event to be send multiple times. Once for each of the drgs deployed.

By filtering the drg metadata that is available in the DeploymentRecord to only include the resource that we are currently transforming we can stop this behavior and support deploying multiple drgs at once.

engine/src/main/java/io/camunda/zeebe/engine/processing/deployment/transform/DmnResourceTransformer.java

@@ -235,8 +235,12 @@ private boolean isDuplicate(
   }
 
   private void writeRecords(final DeploymentRecord deployment, final DeploymentResource resource) {
+    final var metadataRecords =
+        deployment.decisionRequirementsMetadata().stream()
+            .filter(metadata -> metadata.getResourceName().equals(resource.getResourceName()))
+            .collect(Collectors.toList());
 
-    for (final DecisionRequirementsMetadataRecord drg : deployment.decisionRequirementsMetadata()) {
+    for (final DecisionRequirementsMetadataRecord drg : metadataRecords) {
       if (!drg.isDuplicate()) {
         stateWriter.appendFollowUpEvent(
             drg.getDecisionRequirementsKey(),
@@ -253,8 +257,14 @@ private void writeRecords(final DeploymentRecord deployment, final DeploymentRes
       }
     }
 
+    final var decisionRequirementKeys =
+        metadataRecords.stream()
+            .map(DecisionRequirementsMetadataRecord::getDecisionRequirementsKey)
+            .collect(Collectors.toList());
+
     for (final DecisionRecord decision : deployment.decisionsMetadata()) {
-      if (!decision.isDuplicate()) {
+      if (!decision.isDuplicate()
+          && decisionRequirementKeys.contains(decision.getDecisionRequirementsKey())) {
         stateWriter.appendFollowUpEvent(
             decision.getDecisionKey(),
             DecisionIntent.CREATED,