Major improvements: MinIO 4.0.7 compatibility, file handle fixes, clean logging, session management

Key Achievements:
- Downgraded to MinIO 4.0.7 for PowerShell compatibility (eliminated async/await issues)
- Fixed file handle leaks in upload operations (using explicit FileStream management)
- Implemented clean logging (timestamps without redundant prefixes)
- Fixed automatic session variable management (Connect-MinIO stores, cmdlets retrieve)
- Removed duplicate certificate parameters (kept only SkipCertificateValidation)
- Fixed all 'Folder' alias conflicts across cmdlets
- Added correct System.Runtime.CompilerServices.Unsafe.dll version (4.5.3)

 Working Features:
- Connection management (automatic + explicit override)
- Bucket operations (list, create, remove)
- File upload/download (with proper handle release)
- Progress tracking and speed reporting
- Clean verbose logging with timestamps

 Known Issue:
- Chunked operations have threading violations (PowerShell cmdlet methods called from background threads)
- Regular operations work perfectly, chunked operations need threading architecture fix

 Test Results:
- 3.71GB Windows install.wim file tested
- Regular upload/download:  Working
- File handles:  No leaks, immediate deletion possible
- Session management:  Automatic connection storage/retrieval
- Chunked operations:  Threading violations need fix

Session-Debug.ps1

@@ -0,0 +1,40 @@
+# Debug session variable issue
+Import-Module ./Module/PSMinIO/PSMinIO.psd1 -Force
+
+Write-Host "=== Session Variable Debug ===" -ForegroundColor Cyan
+
+# Test credentials
+$endpoint = "https://api.s3.gracesolution.info"
+$accessKey = "T34Wg85SAwezUa3sk3m4"
+$secretKey = "PxEmnbQoQJTJsDocSEV6mSSscDpJMiJCayPv93xe"
+
+Write-Host "1. Before connection - checking variables..." -ForegroundColor Yellow
+Get-Variable -Name "*MinIO*" -Scope Global -ErrorAction SilentlyContinue | ForEach-Object {
+    Write-Host "Found: $($_.Name) = $($_.Value)" -ForegroundColor Gray
+}
+
+Write-Host "2. Connecting..." -ForegroundColor Yellow
+$connection = Connect-MinIO -Endpoint $endpoint -AccessKey $accessKey -SecretKey $secretKey
+
+Write-Host "3. After connection - checking variables..." -ForegroundColor Yellow
+Get-Variable -Name "*MinIO*" -Scope Global -ErrorAction SilentlyContinue | ForEach-Object {
+    Write-Host "Found: $($_.Name) = $($_.Value)" -ForegroundColor Gray
+}
+
+Write-Host "4. Checking specific variable..." -ForegroundColor Yellow
+try {
+    $var = Get-Variable -Name "MinIOConnection" -Scope Global -ErrorAction Stop
+    Write-Host "SUCCESS: Variable exists with value: $($var.Value)" -ForegroundColor Green
+} catch {
+    Write-Host "FAILED: Variable not found: $($_.Exception.Message)" -ForegroundColor Red
+}
+
+Write-Host "5. Testing Get-MinIOBucket with verbose..." -ForegroundColor Yellow
+try {
+    $buckets = Get-MinIOBucket -Verbose
+    Write-Host "SUCCESS: Found $($buckets.Count) buckets" -ForegroundColor Green
+} catch {
+    Write-Host "FAILED: $($_.Exception.Message)" -ForegroundColor Red
+}
+
+Write-Host "Debug completed!" -ForegroundColor Cyan