`PSResourceList` Get returns `_exist: true` when resource is installed in `AllUsers` but default is `CurrentUser`

Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest released version
• Search the existing issues.

Steps to reproduce

As a user, I want _exist to accurately reflect whether a PSResource exists in the requested scope, so that DSC correctly reports and enforces the desired state when scope matters.

The current behavior looks like when a resource entry specifies no scope, ConvertInputToPSResource silently defaults it to CurrentUser. However, GetPSResourceList fetches resources from both scopes and matches on name + version only, totally ignoring the scope. This means when we run, for example, the following document:

resources:
- name: PSResourceList scope test
  type: Microsoft.PowerShell.PSResourceGet/PSResourceList
  properties:
    repositoryName: PSGallery
    resources:
    - name: Pester
      version: '5.7.1'

And Pester is installed in AllUsers scope, it returns:

{ "name": "Pester", "version": "5.7.1", "scope": "AllUsers", "_exist": true }

But the effective desired state has scope: CurrentUser. The resource reports _exist: true with the wrong scope, and a subsequent set will correctly detect a mismatch and reinstall — but the get output is misleading, and _inDesiredState disagreement is confusing.

Expected behavior

`_exist` should reflect whether an instance matching the effective desired scope exists.

Actual behavior

See above JSON snippet

Error details

Environment data

ModuleType Version    PreRelease Name                                PSEdition ExportedCommands
---------- -------    ---------- ----                                --------- ----------------
Binary     1.3.0      preview1   Microsoft.PowerShell.PSResourceGet  Core,Desk {Compress-PSResource, Find-PSResource, …

Key   : PSVersion
Value : 7.6.2
Name  : PSVersion


Key   : PSEdition
Value : Core
Name  : PSEdition


Key   : GitCommitId
Value : 7.6.2
Name  : GitCommitId


Key   : OS
Value : Microsoft Windows 10.0.26100
Name  : OS


Key   : Platform
Value : Win32NT
Name  : Platform


Key   : PSCompatibleVersions
Value : {1.0, 2.0, 3.0, 4.0…}
Name  : PSCompatibleVersions


Key   : PSRemotingProtocolVersion
Value : 2.4
Name  : PSRemotingProtocolVersion


Key   : SerializationVersion
Value : 1.1.0.1
Name  : SerializationVersion


Key   : WSManStackVersion
Value : 3.0
Name  : WSManStackVersion

Visuals

No response