fix: correct paths for python scripts and implement classpath extraction (#3984)

# Description of Changes

- **What was changed**  
- Relocated `png_to_webp.py` and `split_photos.py` from `scripts/` to
`app/core/src/main/resources/static/python/`.
- Updated `.github/labeler-config-srvaroa.yml` and
`.pre-commit-config.yaml` to include the new script directory in their
file-matching patterns.
- Added `GeneralUtils.extractScript(String scriptName)` to load Python
scripts from the classpath (`static/python/`), extract them into a
temporary directory at runtime, and return the filesystem path.

- **Why the change was made**  
- To fix the Internal Server Error caused by missing script files at
their old locations.
- Ensure the Python helper scripts are packaged inside the JAR/WAR and
reliably accessible when the application runs.
  - Only local installations were affected

---

## 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.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

app/core/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertImgPDFController.java

@@ -56,8 +56,8 @@ public class ConvertImgPDFController {
             summary = "Convert PDF to image(s)",
             description =
                     "This endpoint converts a PDF file to image(s) with the specified image format,"
-                            + " color type, and DPI. Users can choose to get a single image or multiple"
-                            + " images.  Input:PDF Output:Image Type:SI-Conditional")
+                        + " color type, and DPI. Users can choose to get a single image or multiple"
+                        + " images.  Input:PDF Output:Image Type:SI-Conditional")
     public ResponseEntity<byte[]> convertToImage(@ModelAttribute ConvertToImageRequest request)
             throws Exception {
         MultipartFile file = request.getFileInput();
@@ -117,10 +117,14 @@ public class ConvertImgPDFController {
                 }
 
                 String pythonVersion = CheckProgramInstall.getAvailablePythonCommand();
+                Path pngToWebpScript = GeneralUtils.extractScript("png_to_webp.py");
 
                 List<String> command = new ArrayList<>();
                 command.add(pythonVersion);
-                command.add("./scripts/png_to_webp.py"); // Python script to handle the conversion
+                command.add(
+                        pngToWebpScript
+                                .toAbsolutePath()
+                                .toString()); // Python script to handle the conversion
 
                 // Create a temporary directory for the output WebP files
                 tempOutputDir = Files.createTempDirectory("webp_output");
@@ -232,7 +236,8 @@ public class ConvertImgPDFController {
                 PdfUtils.imageToPdf(file, fitOption, autoRotate, colorType, pdfDocumentFactory);
         return WebResponseUtils.bytesToWebResponse(
                 bytes,
-                new File(file[0].getOriginalFilename()).getName().replaceFirst("[.][^.]+$", "") + "_converted.pdf");
+                new File(file[0].getOriginalFilename()).getName().replaceFirst("[.][^.]+$", "")
+                        + "_converted.pdf");
     }
 
     private String getMediaType(String imageFormat) {

app/core/src/main/java/stirling/software/SPDF/controller/api/misc/ExtractImageScansController.java

@@ -34,6 +34,7 @@ import stirling.software.SPDF.model.api.misc.ExtractImageScansRequest;
 import stirling.software.common.service.CustomPDFDocumentFactory;
 import stirling.software.common.util.CheckProgramInstall;
 import stirling.software.common.util.ExceptionUtils;
+import stirling.software.common.util.GeneralUtils;
 import stirling.software.common.util.ProcessExecutor;
 import stirling.software.common.util.ProcessExecutor.ProcessExecutorResult;
 import stirling.software.common.util.WebResponseUtils;
@@ -54,9 +55,9 @@ public class ExtractImageScansController {
             summary = "Extract image scans from an input file",
             description =
                     "This endpoint extracts image scans from a given file based on certain"
-                            + " parameters. Users can specify angle threshold, tolerance, minimum area,"
-                            + " minimum contour area, and border size. Input:PDF Output:IMAGE/ZIP"
-                            + " Type:SIMO")
+                        + " parameters. Users can specify angle threshold, tolerance, minimum area,"
+                        + " minimum contour area, and border size. Input:PDF Output:IMAGE/ZIP"
+                        + " Type:SIMO")
     public ResponseEntity<byte[]> extractImageScans(
             @ModelAttribute ExtractImageScansRequest request)
             throws IOException, InterruptedException {
@@ -78,6 +79,7 @@ public class ExtractImageScansController {
         }
 
         String pythonVersion = CheckProgramInstall.getAvailablePythonCommand();
+        Path splitPhotosScript = GeneralUtils.extractScript("split_photos.py");
         try {
             // Check if input file is a PDF
             if ("pdf".equalsIgnoreCase(extension)) {
@@ -120,7 +122,7 @@ public class ExtractImageScansController {
                         new ArrayList<>(
                                 Arrays.asList(
                                         pythonVersion,
-                                        "./scripts/split_photos.py",
+                                        splitPhotosScript.toAbsolutePath().toString(),
                                         images.get(i),
                                         tempDir.toString(),
                                         "--angle_threshold",