Auditing support (#3739)

# Description of Changes

This pull request introduces a comprehensive auditing system to the
application, along with minor updates to existing utilities and
dependencies. The most significant changes include the addition of
audit-related classes and enums, updates to the `ApplicationProperties`
model to support auditing configuration, and enhancements to utility
methods for handling static and trackable resources.

### Audit System Implementation:

* **Audit Aspect for Method Annotations**: Added `AuditAspect` to
process the new `@Audited` annotation, enabling detailed logging of
method execution, HTTP requests, and operation results based on
configurable audit levels.
(`proprietary/src/main/java/stirling/software/proprietary/audit/AuditAspect.java`)
* **Audit Event Types**: Introduced `AuditEventType` enum to define
standardized event types for auditing, such as authentication events,
file operations, and HTTP requests.
(`proprietary/src/main/java/stirling/software/proprietary/audit/AuditEventType.java`)
* **Audit Levels**: Added `AuditLevel` enum to define different levels
of audit logging (OFF, BASIC, STANDARD, VERBOSE), providing granular
control over the amount of data logged.
(`proprietary/src/main/java/stirling/software/proprietary/audit/AuditLevel.java`)

### Application Properties Update:

* **Audit Configuration in `ProFeatures`**: Updated the `ProFeatures`
class in `ApplicationProperties` to include support for auditing with
configurable retention days, levels, and enablement flags.
(`common/src/main/java/stirling/software/common/model/ApplicationProperties.java`)

### Utility Enhancements:

* **Static and Trackable Resource Handling**: Extended `RequestUriUtils`
methods (`isStaticResource` and `isTrackableResource`) to recognize
`.txt` files as valid static and trackable resources.
(`common/src/main/java/stirling/software/common/util/RequestUriUtils.java`)
[[1]](diffhunk://#diff-de3599037908683f2cd8f170939547612c6fc2203e9207eb4d7966508f92bbcbR22)
[[2]](diffhunk://#diff-de3599037908683f2cd8f170939547612c6fc2203e9207eb4d7966508f92bbcbR39)

### Dependency Update:

* **Spring Validation Starter**: Added `spring-boot-starter-validation`
to project dependencies to support validation mechanisms required for
auditing features. (`proprietary/build.gradle`)


Dashboard WIP

![image](https://github.com/user-attachments/assets/20d86809-63b0-44d6-82d3-bdce2ac77aa3)


![image](https://github.com/user-attachments/assets/53a5ba69-71ab-4247-9a66-7ef86e462b13)

![image](https://github.com/user-attachments/assets/9a53eaed-ebc7-463c-81da-8b1c140f8a8c)


---

## 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: a <a>
Co-authored-by: pixeebot[bot] <104101892+pixeebot[bot]@users.noreply.github.com>

common/src/main/java/stirling/software/common/model/ApplicationProperties.java

@@ -439,6 +439,7 @@ public class ApplicationProperties {
         @Data
         public static class ProFeatures {
             private boolean ssoAutoLogin;
+            private boolean database;
             private CustomMetadata customMetadata = new CustomMetadata();
             private GoogleDrive googleDrive = new GoogleDrive();
 
@@ -484,7 +485,15 @@ public class ApplicationProperties {
         @Data
         public static class EnterpriseFeatures {
             private PersistentMetrics persistentMetrics = new PersistentMetrics();
-
+            private Audit audit = new Audit();
+            
+            @Data
+            public static class Audit {
+                private boolean enabled = true;
+                private int level = 2; // 0=OFF, 1=BASIC, 2=STANDARD, 3=VERBOSE
+                private int retentionDays = 90;
+            }
+            
             @Data
             public static class PersistentMetrics {
                 private boolean enabled;

common/src/main/java/stirling/software/common/util/RequestUriUtils.java

@@ -19,6 +19,7 @@ public class RequestUriUtils {
                 || requestURI.endsWith(".svg")
                 || requestURI.endsWith(".png")
                 || requestURI.endsWith(".ico")
+                || requestURI.endsWith(".txt")
                 || requestURI.endsWith(".webmanifest")
                 || requestURI.startsWith(contextPath + "/api/v1/info/status");
     }
@@ -35,6 +36,7 @@ public class RequestUriUtils {
                 || requestURI.endsWith(".png")
                 || requestURI.endsWith(".ico")
                 || requestURI.endsWith(".css")
+                || requestURI.endsWith(".txt")
                 || requestURI.endsWith(".map")
                 || requestURI.endsWith(".svg")
                 || requestURI.endsWith("popularity.txt")