[Fix] Adding toLower to queue to fix the sync trigger call failure (Azure#52775)

* Adding queue lower casing

* Adding test cases for the fix

* Changing the test to have multiple cases.

* Removing unnecesarry comments

Author: mcaupybugs

sdk/storage/Microsoft.Azure.WebJobs.Extensions.Storage.Queues/src/Listeners/QueueScalerProvider.cs

@@ -87,6 +87,21 @@ public void ResolveProperties(INameResolver resolver)
                 {
                     QueueName = resolver.ResolveWholeString(QueueName);
                 }
+                // Always normalize after token resolution
+                NormalizeQueueName();
+            }
+
+            /// <summary>
+            /// Coerces the resolved queue name to lowercase.
+            /// Azure Queue Storage requires lowercase names; normalization here also
+            /// ensures consistent hashing/identity when used by scaling components.
+            /// </summary>
+            private void NormalizeQueueName()
+            {
+                if (!string.IsNullOrEmpty(QueueName))
+                {
+                    QueueName = QueueName.ToLowerInvariant(); // must be lowercase. coerce here to be nice.
+                }
             }
         }
     }

sdk/storage/Microsoft.Azure.WebJobs.Extensions.Storage.Queues/tests/QueueScalerProviderTests.cs

@@ -0,0 +1,47 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using Microsoft.Azure.WebJobs;
+using Microsoft.Azure.WebJobs.Extensions.Storage.Queues.Listeners;
+using NUnit.Framework;
+
+namespace Microsoft.Azure.WebJobs.Extensions.Storage.Queues.Tests
+{
+    [TestFixture]
+    public class QueueScalerProviderTests
+    {
+        [TestCase("%MY_QUEUE%", "mixedcasequeuename", TestName = "TokenResolvedAndLowercased")]
+        [TestCase("MixedCaseQueueName", "mixedcasequeuename", TestName = "DirectMixedCaseLowercased")]
+        [TestCase("alreadylowercase", "alreadylowercase", TestName = "AlreadyLowercaseUnchanged")]
+        [TestCase("", "", TestName = "EmptyStringRemainsEmpty")]
+        [TestCase(null, null, TestName = "NullRemainsNull")]
+        public void ResolveProperties_LowercasesQueueName(string queueName, string expectedOutput)
+        {
+            var metadata = new QueueScalerProvider.QueueMetadata
+            {
+                Connection = "AnyConnection",
+                QueueName = queueName
+            };
+            var resolver = new TestNameResolver();
+
+            // Act
+            metadata.ResolveProperties(resolver);
+
+            // Assert
+            Assert.AreEqual(expectedOutput, metadata.QueueName);
+        }
+
+        private class TestNameResolver : INameResolver
+        {
+            public string Resolve(string name)
+            {
+                if (string.Equals(name, "MY_QUEUE", StringComparison.OrdinalIgnoreCase))
+                {
+                    return "MixedCaseQueueName"; // will be lowercased by ResolveProperties
+                }
+                return null;
+            }
+        }
+    }
+}