Added `Asp.Versioning.Http`, `Microsoft.Extensions.Caching.StackExchangeRedis`, and `Serilog.AspNetCore` to `DocumentOperator.API` for API versioning, Redis caching, and structured logging.
Added `Ardalis.Result`, `FluentValidation`, `FluentValidation.DependencyInjectionExtensions`, and `MediatR` to `DocumentOperator.Application` for result handling, validation, and mediator pattern support.
Added `DevExpress.Pdf.Core` and `Microsoft.Extensions.Options.ConfigurationExtensions` to `DocumentOperator.Infrastructure` for PDF processing and configuration management.
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