Rename CustomPDDocumentFactory to CustomPDFDocumentFactory across multiple controllers (#3163)

# Description of Changes

Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)

---

## 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.

---------

Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>

src/main/java/stirling/software/SPDF/service/CustomPDFDocumentFactory.java

@@ -29,7 +29,7 @@ import stirling.software.SPDF.model.api.PDFFile;
  */
 @Component
 @Slf4j
-public class CustomPDDocumentFactory {
+public class CustomPDFDocumentFactory {
 
     private final PdfMetadataService pdfMetadataService;
 
@@ -63,7 +63,7 @@ public class CustomPDDocumentFactory {
     // Counter for tracking temporary resources
     private static final AtomicLong tempCounter = new AtomicLong(0);
 
-    public CustomPDDocumentFactory(PdfMetadataService pdfMetadataService) {
+    public CustomPDFDocumentFactory(PdfMetadataService pdfMetadataService) {
         this.pdfMetadataService = pdfMetadataService;
     }
 
@@ -168,8 +168,8 @@ public class CustomPDDocumentFactory {
     private PDDocument loadAdaptively(Object source, long contentSize) throws IOException {
         // Get the appropriate caching strategy
         StreamCacheCreateFunction cacheFunction = getStreamCacheFunction(contentSize);
-        
-        //If small handle as bytes and remove original file
+
+        // If small handle as bytes and remove original file
         if (contentSize <= SMALL_FILE_THRESHOLD && source instanceof File file) {
             source = Files.readAllBytes(file.toPath());
             file.delete();
@@ -192,7 +192,7 @@ public class CustomPDDocumentFactory {
             throws IOException {
         // Get the appropriate caching strategy
         StreamCacheCreateFunction cacheFunction = getStreamCacheFunction(contentSize);
-        //If small handle as bytes and remove original file
+        // If small handle as bytes and remove original file
         if (contentSize <= SMALL_FILE_THRESHOLD && source instanceof File file) {
             source = Files.readAllBytes(file.toPath());
             file.delete();