fix few more stuff

Author: sourabh1007

Microsoft.Azure.Cosmos/src/Telemetry/OpenTelemetry/OpenTelemetryAttributes.cs

@@ -4,9 +4,7 @@
 
 namespace Microsoft.Azure.Cosmos.Telemetry
 {
-    using System;
     using System.Net;
-    using global::Azure.Core;
     using Microsoft.Azure.Cosmos.Query.Core;
 
     internal class OpenTelemetryAttributes
@@ -32,7 +30,6 @@ internal OpenTelemetryAttributes(RequestMessage requestMessage)
             {
                 this.OperationType = Documents.OperationType.Invalid;
             }
-
         }
 
         /// <summary>

Microsoft.Azure.Cosmos/src/Telemetry/OpenTelemetry/OpenTelemetryCoreRecorder.cs

@@ -242,13 +242,19 @@ public void Dispose()
             {
                 OperationType operationType
                     = (this.response == null || this.response?.OperationType == OperationType.Invalid) ? this.operationType : this.response.OperationType;
+                if (otelStabilityMode != OpenTelemetryStablityModes.DatabaseDupe)
+                {
+                    string operationName = Enum.GetName(typeof(OperationType), operationType);
+                    this.scope.AddAttribute(AppInsightClassicAttributeKeys.OperationType, operationName);
+                }
+
                 if (this.response != null)
                 {
                     if (this.response.BatchSize is not null)
                     {
                         this.scope.AddIntegerAttribute(OpenTelemetryAttributeKeys.BatchSize, (int)this.response.BatchSize);
                     }
-                   
+
                     if (otelStabilityMode == OpenTelemetryStablityModes.DatabaseDupe)
                     {
                         this.scope.AddIntegerAttribute(OpenTelemetryAttributeKeys.StatusCode, (int)this.response.StatusCode);