Optimize module loading performance (#484)

CHANGELOG.md

@@ -39,6 +39,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added new utillity function `Get-CosmosDbAuthorizationHeaderFromContextEntraId` to generate the authorization
   header when an Entra ID Token is provided in the context. This function is used by `Invoke-CosmosDbRequest` to
   generate the authorization header when an Entra ID Token is provided.
+- Changed module import process to load the `Az.Accounts` and `Az.Resources` modules
+  only if they haven't already been loaded to support saving the module and storing in
+  folders.
 
 ### Added
 

source/prefix.ps1

@@ -9,9 +9,16 @@ $script:moduleRoot = Split-Path `
     -Path $MyInvocation.MyCommand.Path `
     -Parent
 
-# Import dependent Az modules
-Import-Module -Name Az.Accounts -MinimumVersion 2.19.0 -Scope Global
-Import-Module -Name Az.Resources -MinimumVersion 6.16.2 -Scope Global
+# Import dependent Az modules ifthey are not already imported
+if (-not (Get-Module -Name Az.Accounts))
+{
+    Import-Module -Name Az.Accounts -MinimumVersion 2.19.0 -Scope Global
+}
+
+if (-not (Get-Module -Name Az.Resources))
+{
+    Import-Module -Name Az.Resources -MinimumVersion 6.16.2 -Scope Global
+}
 
 #region LocalizedData
 $culture = $PSUICulture