Fix: NoSuchFileException if configs\db\backup is not present on first start (#2665)

# Description

```bash
20:38:21.452 [restartedMain] ERROR s.s.S.c.s.database.DatabaseService - Error reading backup directory: configs\db\backup
java.nio.file.NoSuchFileException: configs\db\backup
        at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:85)
        at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
        at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108)
        at java.base/sun.nio.fs.WindowsDirectoryStream.<init>(WindowsDirectoryStream.java:86)
        at java.base/sun.nio.fs.WindowsFileSystemProvider.newDirectoryStream(WindowsFileSystemProvider.java:541)
        at java.base/java.nio.file.Files.newDirectoryStream(Files.java:613)
        at stirling.software.SPDF.config.security.database.DatabaseService.getBackupList(DatabaseService.java:80)
        at stirling.software.SPDF.config.security.database.DatabaseService.exportDatabase(DatabaseService.java:156)
        at stirling.software.SPDF.config.security.UserService.saveUser(UserService.java:214)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:359)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:723)
        at stirling.software.SPDF.config.security.UserService$$SpringCGLIB$$3.saveUser(<generated>)
        at stirling.software.SPDF.config.security.InitialSecuritySetup.createDefaultAdminUser(InitialSecuritySetup.java:76)
        at stirling.software.SPDF.config.security.InitialSecuritySetup.initializeAdminUser(InitialSecuritySetup.java:67)
        at stirling.software.SPDF.config.security.InitialSecuritySetup.init(InitialSecuritySetup.java:42)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMethod.invoke(InitDestroyAnnotationBeanPostProcessor.java:457)
        at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:401)
        at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:219)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:423)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:601)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:523)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:336)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:289)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:334)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.instantiateSingleton(DefaultListableBeanFactory.java:1122)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingleton(DefaultListableBeanFactory.java:1093)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:1030)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:987)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:318)
        at stirling.software.SPDF.SPDFApplication.main(SPDFApplication.java:117)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50)
```

## Checklist

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have performed a self-review of my own code
- [ ] I have attached images of the change if it is UI based
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [x] My changes generate no new warnings
- [ ] 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)

src/main/java/stirling/software/SPDF/config/security/database/DatabaseService.java

@@ -55,6 +55,7 @@ public class DatabaseService implements DatabaseInterface {
      */
     @Override
     public boolean hasBackup() {
+        createBackupDirectory();
         Path filePath = Paths.get(BACKUP_DIR);
 
         if (Files.exists(filePath)) {
@@ -74,6 +75,8 @@ public class DatabaseService implements DatabaseInterface {
         List<FileInfo> backupFiles = new ArrayList<>();
 
         if (isH2Database()) {
+            createBackupDirectory();
+
             Path backupPath = Paths.get(BACKUP_DIR);
 
             try (DirectoryStream<Path> stream =
@@ -110,6 +113,18 @@ public class DatabaseService implements DatabaseInterface {
         return backupFiles;
     }
 
+    private void createBackupDirectory() {
+        Path backupPath = Paths.get(BACKUP_DIR);
+        if (!Files.exists(backupPath)) {
+            try {
+                Files.createDirectories(backupPath);
+                log.debug("create backup directory: {}", BACKUP_DIR);
+            } catch (IOException e) {
+                log.error("Error create backup directory: {}", e.getMessage(), e);
+            }
+        }
+    }
+
     @Override
     public void importDatabase() {
         if (!hasBackup()) throw new BackupNotFoundException("No backup scripts were found.");
@@ -255,6 +270,7 @@ public class DatabaseService implements DatabaseInterface {
      * @return the <code>Path</code> object for the given file name
      */
     public Path getBackupFilePath(String fileName) {
+        createBackupDirectory();
         Path filePath = Paths.get(BACKUP_DIR, fileName).normalize();
         if (!filePath.startsWith(BACKUP_DIR)) {
             throw new SecurityException("Path traversal detected");