Memory enhancements and PDF decompress API (#3129)

# Description of Changes

- PDF split by size to check size of PDF as it splits, avoids issue were
a PDFs size is different viewed vs saved due to compression caused by
repeated data etc.
- Additionally memory enhancements for PDF load to dynamically load in
memory vs scratch
- PDF Decompress API for PDF testing


## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

src/main/java/stirling/software/SPDF/controller/api/SplitPdfByChaptersController.java

@@ -8,7 +8,6 @@ import java.util.List;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
-import org.apache.pdfbox.Loader;
 import org.apache.pdfbox.pdmodel.PDDocument;
 import org.apache.pdfbox.pdmodel.PDPage;
 import org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDDocumentOutline;
@@ -34,6 +33,7 @@ import lombok.extern.slf4j.Slf4j;
 
 import stirling.software.SPDF.model.PdfMetadata;
 import stirling.software.SPDF.model.api.SplitPdfByChaptersRequest;
+import stirling.software.SPDF.service.CustomPDDocumentFactory;
 import stirling.software.SPDF.service.PdfMetadataService;
 import stirling.software.SPDF.utils.WebResponseUtils;
 
@@ -45,9 +45,13 @@ public class SplitPdfByChaptersController {
 
     private final PdfMetadataService pdfMetadataService;
 
+    private final CustomPDDocumentFactory pdfDocumentFactory;
+
     @Autowired
-    public SplitPdfByChaptersController(PdfMetadataService pdfMetadataService) {
+    public SplitPdfByChaptersController(
+            PdfMetadataService pdfMetadataService, CustomPDDocumentFactory pdfDocumentFactory) {
         this.pdfMetadataService = pdfMetadataService;
+        this.pdfDocumentFactory = pdfDocumentFactory;
     }
 
     private static List<Bookmark> extractOutlineItems(
@@ -135,7 +139,7 @@ public class SplitPdfByChaptersController {
             if (bookmarkLevel < 0) {
                 return ResponseEntity.badRequest().body("Invalid bookmark level".getBytes());
             }
-            sourceDocument = Loader.loadPDF(file.getBytes());
+            sourceDocument = pdfDocumentFactory.load(file.getBytes());
 
             PDDocumentOutline outline = sourceDocument.getDocumentCatalog().getDocumentOutline();