[Event Hubs] Fix trigger data label (Azure#48517)

The focus of these changes is to fix a misspelling of "PartitionId" in the
trigger input data passed to the function executor.  This caused function logs
and metrics reported by AppInsights and the portal to reflect the wrong label.
To ensure that applications that rely on the misspelling are not impacted, a new
member with the correct spelling was added.

Author: jsquire

sdk/eventhub/Microsoft.Azure.WebJobs.Extensions.EventHubs/CHANGELOG.md

@@ -8,6 +8,8 @@
 
 ### Bugs Fixed
 
+- Fixed a misspelling of "PartitionId" in the trigger input data passed to the function executor.  This caused function logs and metrics reported by AppInsights and the portal to reflect the wrong label.  To ensure that applications that rely on the misspelling are not impacted, a new member with the correct spelling was added.
+
 ### Other Changes
 
 ## 6.3.5 (2024-08-01)

sdk/eventhub/Microsoft.Azure.WebJobs.Extensions.EventHubs/src/Triggers/EventHubTriggerInput.cs

@@ -1,10 +1,9 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
-using Azure.Messaging.EventHubs;
 using System.Collections.Generic;
 using System.Globalization;
-using Azure.Messaging.EventHubs.Consumer;
+using Azure.Messaging.EventHubs;
 using Azure.Messaging.EventHubs.Primitives;
 using Microsoft.Azure.WebJobs.EventHubs.Processor;
 
@@ -83,11 +82,15 @@ public Dictionary<string, string> GetTriggerDetails(EventProcessorPartition cont
 
             return new Dictionary<string, string>()
             {
-                { "PartionId", context.PartitionId },
+                { "PartitionId", context.PartitionId },
                 { "Offset", offset },
                 { "EnqueueTimeUtc", enqueueTimeUtc },
                 { "SequenceNumber", sequenceNumber },
-                { "Count", Events.Length.ToString(CultureInfo.InvariantCulture)}
+                { "Count", Events.Length.ToString(CultureInfo.InvariantCulture)},
+
+                // Preserve a misspelling that existed in the original code, as
+                // there may be applications relying on this.
+                { "PartionId", context.PartitionId }
             };
         }
     }