Unable to get PartitionContext for eventhub trigger

### Description

**Description**
Using an EventHub triggered function with PartitionContext as parameter causes an error:

> Exception: Microsoft.Azure.Functions.Worker.FunctionInputConverterException: Error converting 1 input parameters for Function 'LanderInitial': Cannot convert input parameter 'partitionContext' to type 'Azure.Messaging.EventHubs.Consumer.PartitionContext' from type 'System.String'. Error:System.NotSupportedException: Deserialization of types without a parameterless constructor, a singular parameterized constructor, or a parameterized constructor annotated with 'JsonConstructorAttribute' is not supported. Type 'Azure.Messaging.EventHubs.Consumer.PartitionContext'. Path: $ | LineNumber: 0 | BytePositionInLine: 1.

```
[Function("LanderInitial")]
[FixedDelayRetry(1, "00:00:30")]
public async Task Run(
[EventHubTrigger(
eventHubName: "ingestion",
Connection = "IngestionEventHubConnStr",
ConsumerGroup = "lander-initial",
IsBatched = false)]
EventData myEventHubMessage,
Microsoft.Azure.WebJobs.ExecutionContext exeContext,
PartitionContext partitionContext)
{
```

The versions I am using are as follows:
```

```

### Steps to reproduce

Try to use PartitionContext as parameter in azure function with eventhub trigger

Start by reproducing the EventHub-triggered function using the shown PartitionContext parameter and package versions, then trace the reported FunctionInputConverterException and its input-conversion path. Done means the function accepts PartitionContext without attempting unsupported string deserialization, with the behavior verified against the reproduction example.

Written by the indexing model from the issue text.