64be11f7ad
Updated ROADMAP.md to reflect progress on the TDD process for DevExpressPdfProcessor, including the creation of unit tests (6 tests in the Red Phase). Updated progress to 4/7 mini-steps completed and outlined the next step (Green Phase). Added `DevExpressPdfProcessorTests.cs` with unit tests to validate PDF files and extract metadata. Tests cover valid PDFs, null/empty inputs, corrupted PDFs, and file size calculations. Used `FluentAssertions` for assertions. Cleaned up `DocumentOperator.Tests.csproj` by removing an unused folder reference. No functional changes to the project structure.