Still can't seem to pass complex output to activity functions

Related Issue: https://github.com/Azure/azure-functions-durable-extension/issues/1922

If I build up a ps object with sub-objects in an orchestration function and send that to an activity function, it ends up as a hashtable on the other side:
```powershell
$InputData = [PSCustomObject]@{
Data = $Data
Documents = $Documents
SyncDataType = $SyncDataType
}
Invoke-DurableActivity -FunctionName 'Sync-DataWithDocuments' -Input $InputData
```
Maybe this is just a limitation but I want to be sure before I use workarounds. I can get it to work if I do the following:
```powershell
$InputData = [PSCustomObject]@{
Data = $Data
Documents = $Documents
SyncDataType = $SyncDataType
}
Invoke-DurableActivity -FunctionName 'Sync-DataWithDocuments' -Input ($InputData | ConvertTo-Json -Depth 100)
```
Then in the activity function
```powershell
function Sync-DataWithDocuments {
Param($Object)
$Object = $Object | ConvertTo-Json -Depth 100 | ConvertFrom-Json
}
```

Start by reproducing the shown PSCustomObject flow between the orchestration function and Sync-DataWithDocuments, comparing direct Input with the ConvertTo-Json workaround. Trace how nested values are serialized and deserialized; done means complex input retains its intended object shape, or the limitation and supported workaround are documented.

Written by the indexing model from the issue text.