Implement comprehensive MinIO feature set with enterprise-grade functionality

✅ MULTIPART UPLOAD SUPPORT:
  • MultipartUploadManager with parallel processing and resume capability
  • Configurable chunk sizes (minimum 5MB for S3 compatibility)
  • Parallel uploads with semaphore-controlled concurrency
  • Resume functionality with upload ID and completed parts tracking
  • Comprehensive progress tracking with speed calculations
  • New-MinIOObjectMultipart cmdlet with FileInfo support

✅ MULTIPART DOWNLOAD WITH RESUME:
  • MultipartDownloadManager with parallel processing
  • Resume capability for interrupted downloads
  • Range request support for efficient chunked downloads
  • Enhanced progress tracking for large files
  • Get-MinIOObjectContentMultipart cmdlet with resume support

✅ PRESIGNED URL GENERATION:
  • PresignedUrlGenerator with AWS Signature Version 4
  • Configurable expiration times (1 second to 7 days)
  • Permission-based access control (GET, PUT, DELETE, HEAD)
  • Additional headers support for custom requirements
  • New-MinIOPresignedUrl and Get-MinIOPresignedUrl cmdlets

✅ BUCKET POLICY MANAGEMENT:
  • BucketPolicyManager with comprehensive validation
  • Get, set, delete policy operations with JSON support
  • Policy validation and formatting capabilities
  • Built-in policy templates (read-only, read-write)
  • Get/Set/Remove-MinIOBucketPolicy cmdlets with ShouldProcess

✅ ADVANCED OBJECT METADATA HANDLING:
  • AdvancedMetadataHandler for S3-compatible metadata
  • Custom headers and content encoding support
  • Cache control and expiration settings
  • Server-side encryption configuration
  • Object tagging and user metadata support

✅ ARCHITECTURE ENHANCEMENTS:
  • Thread-safe operations with proper semaphore management
  • Comprehensive error handling and validation
  • Progress tracking integration with existing PSMinIO patterns
  • Consistent parameter naming and PowerShell best practices
  • Enterprise-grade logging and metrics collection

✅ CMDLET FEATURES:
  • FileInfo parameter support for type safety
  • ShouldProcess support for destructive operations
  • Comprehensive parameter validation and error handling
  • Always-return object pattern (no PassThru needed)
  • Pipeline compatibility and verbose logging

✅ PERFORMANCE OPTIMIZATIONS:
  • Configurable parallel processing (1-10 threads)
  • Intelligent chunk sizing with S3 compatibility
  • Memory-efficient streaming operations
  • Resume capability to minimize data transfer
  • Real-time speed and ETA calculations

Features: True multipart uploads/downloads, presigned URLs, bucket policies,
advanced metadata, parallel processing, resume capability, comprehensive
progress tracking, and enterprise-grade reliability.

src/Cmdlets/GetMinIOObjectCmdlet.cs

@@ -108,7 +108,7 @@ namespace PSMinIO.Cmdlets
                 {
                     var wildcardPattern = new WildcardPattern(Name, WildcardOptions.IgnoreCase);
                     objects = objects.Where(o => o.Name != null && wildcardPattern.IsMatch(o.Name)).ToList();
-                    WriteVerboseMessage("Filtered to {0} objects matching pattern '{1}'", objects.Count, Name);
+                    WriteVerboseMessage("Filtered to {0} objects matching pattern '{1}'", objects.Count, Name!);
                 }
 
                 // Apply directory filters