feat(common,core,proprietary): remove unused injections, enhance type safety, and improve test mocks (#4213)

# Description of Changes

This PR introduces several refactorings and minor enhancements across
the `common`, `core`, and `proprietary` modules:

- **Dependency Injection Cleanup**
- Removed unused constructor-injected dependencies (e.g.,
`FileOrUploadService`, `ApplicationProperties`, redundant `@Autowired`
annotations).
  - Simplified constructors to only require actively used dependencies.

- **Model Enhancements**
- Added `@NoArgsConstructor` to `FileInfo`, `PdfMetadata`, and
`SignatureFile` to improve serialization/deserialization support.

- **Service Improvements**
- Improved `JobExecutorService` content type retrieval by assigning
`MediaType` to a variable before conversion.
- Enhanced `KeyPersistenceService` with type-safe
`.filter(JwtVerificationKey.class::isInstance)`.
- Annotated `decodePublicKey` in `KeyPersistenceService` with
`@Override` for clarity.

- **Controller & API Changes**
- Updated `AdminSettingsController` to use
`TypeReference<Map<String,Object>>` for safer conversion.
- Improved long log and description strings with consistent formatting.

- **Testing Updates**
- Replaced `.lenient()` mock settings with
`.defaultAnswer(RETURNS_DEFAULTS)` for `FileToPdf` static mocks.
- Used `ArgumentMatchers.<TypeReference<List<BookmarkItem>>>any()` in
`EditTableOfContentsControllerTest` for type safety.
- Updated `UserServiceTest` default `AuthenticationType` from `SSO` to
`OAUTH2`.

- **Formatting**
  - Broke up long log/debug lines for better readability.
  - Removed redundant `@SuppressWarnings` where type safety was ensured.

These changes aim to make the codebase leaner, more type-safe, and
maintainable, while improving test reliability.

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/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/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] 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/devGuide/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/devGuide/DeveloperGuide.md#6-testing)
for more details.

app/core/src/test/java/stirling/software/SPDF/controller/api/EditTableOfContentsControllerTest.java

@@ -20,6 +20,7 @@ import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.ArgumentCaptor;
+import org.mockito.ArgumentMatchers;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
@@ -202,7 +203,9 @@ class EditTableOfContentsControllerTest {
         bookmarks.add(bookmark);
 
         when(pdfDocumentFactory.load(mockFile)).thenReturn(mockDocument);
-        when(objectMapper.readValue(eq(request.getBookmarkData()), any(TypeReference.class)))
+        when(objectMapper.readValue(
+                        eq(request.getBookmarkData()),
+                        ArgumentMatchers.<TypeReference<List<BookmarkItem>>>any()))
                 .thenReturn(bookmarks);
         when(mockDocument.getDocumentCatalog()).thenReturn(mockCatalog);
         when(mockDocument.getNumberOfPages()).thenReturn(5);
@@ -242,7 +245,8 @@ class EditTableOfContentsControllerTest {
         request.setFileInput(mockFile);
 
         String bookmarkJson =
-                "[{\"title\":\"Chapter 1\",\"pageNumber\":1,\"children\":[{\"title\":\"Section 1.1\",\"pageNumber\":2,\"children\":[]}]}]";
+                "[{\"title\":\"Chapter 1\",\"pageNumber\":1,\"children\":[{\"title\":\"Section"
+                        + " 1.1\",\"pageNumber\":2,\"children\":[]}]}]";
         request.setBookmarkData(bookmarkJson);
 
         List<BookmarkItem> bookmarks = new ArrayList<>();
@@ -261,7 +265,9 @@ class EditTableOfContentsControllerTest {
         bookmarks.add(parentBookmark);
 
         when(pdfDocumentFactory.load(mockFile)).thenReturn(mockDocument);
-        when(objectMapper.readValue(eq(bookmarkJson), any(TypeReference.class)))
+        when(objectMapper.readValue(
+                        eq(bookmarkJson),
+                        ArgumentMatchers.<TypeReference<List<BookmarkItem>>>any()))
                 .thenReturn(bookmarks);
         when(mockDocument.getDocumentCatalog()).thenReturn(mockCatalog);
         when(mockDocument.getNumberOfPages()).thenReturn(5);
@@ -292,7 +298,8 @@ class EditTableOfContentsControllerTest {
         EditTableOfContentsRequest request = new EditTableOfContentsRequest();
         request.setFileInput(mockFile);
         request.setBookmarkData(
-                "[{\"title\":\"Chapter 1\",\"pageNumber\":-5,\"children\":[]},{\"title\":\"Chapter 2\",\"pageNumber\":100,\"children\":[]}]");
+                "[{\"title\":\"Chapter 1\",\"pageNumber\":-5,\"children\":[]},{\"title\":\"Chapter"
+                        + " 2\",\"pageNumber\":100,\"children\":[]}]");
 
         List<BookmarkItem> bookmarks = new ArrayList<>();
 
@@ -310,7 +317,9 @@ class EditTableOfContentsControllerTest {
         bookmarks.add(bookmark2);
 
         when(pdfDocumentFactory.load(mockFile)).thenReturn(mockDocument);
-        when(objectMapper.readValue(eq(request.getBookmarkData()), any(TypeReference.class)))
+        when(objectMapper.readValue(
+                        eq(request.getBookmarkData()),
+                        ArgumentMatchers.<TypeReference<List<BookmarkItem>>>any()))
                 .thenReturn(bookmarks);
         when(mockDocument.getDocumentCatalog()).thenReturn(mockCatalog);
         when(mockDocument.getNumberOfPages()).thenReturn(5);