Fix failure due to immutability changes

Author: yashmeet29

sdm/src/main/java/com/sap/cds/sdm/model/AttachmentMoveContext.java

@@ -1,7 +1,6 @@
 package com.sap.cds.sdm.model;
 
 import com.sap.cds.reflect.CdsEntity;
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
@@ -57,6 +56,6 @@ public AttachmentProcessingResults getProcessingResults() {
   }
 
   public List<Map<String, String>> getFailedAttachments() {
-    return Collections.unmodifiableList(failedAttachments);
+    return failedAttachments;
   }
 }

sdm/src/main/java/com/sap/cds/sdm/model/DatabaseFailureContext.java

@@ -1,7 +1,6 @@
 package com.sap.cds.sdm.model;
 
 import com.sap.cds.sdm.service.handler.AttachmentMoveEventContext;
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
@@ -64,8 +63,6 @@ public AttachmentMoveEventContext getContext() {
   }
 
   public List<Map<String, String>> getFailedAttachments() {
-    // Return an unmodifiable list with each map also wrapped as unmodifiable for deep immutability
-    return Collections.unmodifiableList(
-        failedAttachments.stream().map(Collections::unmodifiableMap).toList());
+    return failedAttachments;
   }
 }

sdm/src/main/java/com/sap/cds/sdm/model/ValidatedAttachmentData.java

@@ -1,7 +1,7 @@
 package com.sap.cds.sdm.model;
 
 import com.sap.cds.reflect.CdsEntity;
-import java.util.Collections;
+import com.sap.cds.sdm.service.CmisDocument;
 import java.util.List;
 import java.util.Map;
 import org.json.JSONObject;
@@ -81,15 +81,15 @@ public CdsEntity getTargetEntity() {
   }
 
   public List<String> getSuccessfulObjectIds() {
-    return List.copyOf(successfulObjectIds);
+    return successfulObjectIds;
   }
 
   public List<List<String>> getMovedAttachmentsMetadata() {
-    return Collections.unmodifiableList(movedAttachmentsMetadata);
+    return movedAttachmentsMetadata;
   }
 
   public List<CmisDocument> getPopulatedDocuments() {
-    return Collections.unmodifiableList(populatedDocuments);
+    return populatedDocuments;
   }
 
   public CmisDocument getSourceCmisDocument() {