.NET: Cosmos DB UT Fast Skip (For Non-Configured Local envs) (#2906)

* Cosmos DB UT Fast Skip (Non-Configured Local envs) + Long running UT skip in pipeline when no CosmosDB changes happened

* Force a CosmosDB source code change to trigger the pipeline

* Address possible string boolean mismatch

* Add debug

* Enabling emulator always when running IT

dotnet/src/Microsoft.Agents.AI.CosmosNoSql/CosmosCheckpointStore.cs

@@ -217,9 +217,7 @@ public class CosmosCheckpointStore<T> : JsonCheckpointStore, IDisposable
         }
     }
 
-    /// <summary>
-    /// Represents a checkpoint document stored in Cosmos DB.
-    /// </summary>
+    /// <summary>Represents a checkpoint document stored in Cosmos DB.</summary>
     internal sealed class CosmosCheckpointDocument
     {
         [JsonProperty("id")]