[BUG] System Center Virtual Machine Manager Inventory Items List API cannot immediately return a list of Inventory Items after System Center Virtual Machine Manager Server is created

### API Spec link

https://github.com/Azure/azure-rest-api-specs/blob/cf5ad1932d00c7d15497705ad6b71171d3d68b1e/specification/scvmm/resource-manager/Microsoft.ScVmm/stable/2023-10-07/scvmm.json#L1986

### API Spec version

2023-10-07

### Describe the bug

After tested, I found Inventory Items List API wouldn't immediately return a list of inventory items after SCVMM Server is created. But I can get the list after SCVMM Server is created and then wait for a while like 1 minute. Seems it's a bug. Please fix it asap. Thanks.

### Expected behavior

System Center Virtual Machine Manager Inventory Items List API can immediately return a list of Inventory Items after System Center Virtual Machine Manager Server is created.

### Actual behavior

Inventory Items List API wouldn't immediately return a list of inventory items after SCVMM Server is created. But I can get the list after SCVMM Server is created and then wait for a while like 1 minute.

### Reproduction Steps

1. Create a resource group
2. Create a System Center Virtual Machine Manager Server
3. Invoke Inventory Items List API to get a list of System Center Virtual Machine Manager Inventory Items

### Environment

Production