fix(analyzer): suppress unavoidable ConvertTo-SecureString error in Azure CLI auth

PSScriptAnalyzer flagged PSAvoidUsingConvertToSecureStringWithPlainText as a
blocking Error at Connect-RangerAzureContext (40-Execution.ps1:883), failing CI.
The Azure CLI (az account get-access-token) returns the ARM access token as a
plaintext string, and Connect-AzAccount -AccessToken requires a SecureString on
Az.Accounts 5+, so an in-memory ConvertTo-SecureString is the only supported
conversion — no secret is persisted. Added a scoped SuppressMessageAttribute
with justification rather than altering behavior.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: kristopherjturner

Modules/Private/40-Execution.ps1

@@ -746,6 +746,8 @@ function Connect-RangerAzureContext {
         avoiding MFA prompts on every run. Forwards Environment (sovereign
         cloud) and TenantId / Subscription to Connect-AzAccount.
     #>
+    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingConvertToSecureStringWithPlainText', '',
+        Justification = 'The Azure CLI (az account get-access-token) returns the ARM access token as a plaintext string; Connect-AzAccount -AccessToken requires a SecureString on Az.Accounts 5+, so an in-memory ConvertTo-SecureString is the only supported conversion. No secret is persisted.')]
     param(
         $AzureCredentialSettings
     )