Replaced iText-based PDF processing with DevExpress PdfGraphics API.
Removed `itext` and `itext.bouncy-castle-adapter` dependencies.
Simplified `BuildReport` to burn signatures directly into PDFs
and render all pages using `XRPdfContent` with `GenerateOwnPages = true`.
Consolidated subreport logic into `BuildReport` and removed
`BuildPageSubreport`. Eliminated unused constants and methods,
including `GetPdfPageCount`. Updated XML documentation to reflect
the new implementation. Placeholder implementation for
`BurnSignaturesIntoPdf` added, pending further development.
TekH
733b70cca2