Fix RCS1124

Author: stephentoub

dotnet/src/Microsoft.Agents.AI.Purview/ScopedContentProcessor.cs

@@ -242,22 +242,16 @@ private async Task<ProcessContentResponse> ProcessContentWithProtectionScopesAsy
     /// </summary>
     /// <param name="pcResponse">The process content response which may contain DLP actions.</param>
     /// <param name="actionInfos">DLP actions returned from protection scopes.</param>
-    /// <returns>The process content response with the protection scopes DLP actions added. Actions are deduplicated.</returns>
+    /// <returns>The process content response with the protection scopes DLP actions added.</returns>
     private static ProcessContentResponse CombinePolicyActions(ProcessContentResponse pcResponse, List<DlpActionInfo>? actionInfos)
     {
-        if (actionInfos == null || actionInfos.Count == 0)
+        if (actionInfos?.Count > 0)
         {
-            return pcResponse;
-        }
-
-        if (pcResponse.PolicyActions == null)
-        {
-            pcResponse.PolicyActions = actionInfos;
-            return pcResponse;
+            pcResponse.PolicyActions = pcResponse.PolicyActions is null ?
+                actionInfos :
+                [.. pcResponse.PolicyActions, .. actionInfos];
         }
 
-        List<DlpActionInfo> pcActionInfos = [.. pcResponse.PolicyActions, .. actionInfos];
-        pcResponse.PolicyActions = pcActionInfos;
         return pcResponse;
     }