Security fixes, enterprise stuff and more (#3241)

# Description of Changes

Please provide a summary of the changes, including:

- Enable user to add custom JAVA ops with env JAVA_CUSTOM_OPTS
- Added support for prometheus (enabled via JAVA_CUSTOM_OPTS +
enterprise license)
- Changed settings from enterprise naming to 'Premium'
- KeygenLicense Check to support offline licenses
- Disable URL-to-PDF due to huge security bug
- Remove loud Split PDF logs
- addUsers renamed to adminSettings
- Added Usage analytics page
- Add user button to only be enabled based on total users free
- Improve Merge memory usage


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

src/main/java/stirling/software/SPDF/EE/EEAppConfig.java

@@ -8,6 +8,8 @@ import org.springframework.core.annotation.Order;
 import lombok.extern.slf4j.Slf4j;
 
 import stirling.software.SPDF.model.ApplicationProperties;
+import stirling.software.SPDF.model.ApplicationProperties.EnterpriseEdition;
+import stirling.software.SPDF.model.ApplicationProperties.Premium;
 
 @Configuration
 @Order(Ordered.HIGHEST_PRECEDENCE)
@@ -22,6 +24,7 @@ public class EEAppConfig {
             ApplicationProperties applicationProperties, LicenseKeyChecker licenseKeyChecker) {
         this.applicationProperties = applicationProperties;
         this.licenseKeyChecker = licenseKeyChecker;
+        migrateEnterpriseSettingsToPremium(this.applicationProperties);
     }
 
     @Bean(name = "runningEE")
@@ -31,6 +34,74 @@ public class EEAppConfig {
 
     @Bean(name = "SSOAutoLogin")
     public boolean ssoAutoLogin() {
-        return applicationProperties.getEnterpriseEdition().isSsoAutoLogin();
+        return applicationProperties.getPremium().getProFeatures().isSsoAutoLogin();
+    }
+
+    // TODO: Remove post migration
+    public void migrateEnterpriseSettingsToPremium(ApplicationProperties applicationProperties) {
+        EnterpriseEdition enterpriseEdition = applicationProperties.getEnterpriseEdition();
+        Premium premium = applicationProperties.getPremium();
+
+        // Only proceed if both objects exist
+        if (enterpriseEdition == null || premium == null) {
+            return;
+        }
+
+        // Copy the license key if it's set in enterprise but not in premium
+        if (premium.getKey() == null
+                || premium.getKey().equals("00000000-0000-0000-0000-000000000000")) {
+            if (enterpriseEdition.getKey() != null
+                    && !enterpriseEdition.getKey().equals("00000000-0000-0000-0000-000000000000")) {
+                premium.setKey(enterpriseEdition.getKey());
+            }
+        }
+
+        // Copy enabled state if enterprise is enabled but premium is not
+        if (!premium.isEnabled() && enterpriseEdition.isEnabled()) {
+            premium.setEnabled(true);
+        }
+
+        // Copy SSO auto login setting
+        if (!premium.getProFeatures().isSsoAutoLogin() && enterpriseEdition.isSsoAutoLogin()) {
+            premium.getProFeatures().setSsoAutoLogin(true);
+        }
+
+        // Copy CustomMetadata settings
+        Premium.ProFeatures.CustomMetadata premiumMetadata =
+                premium.getProFeatures().getCustomMetadata();
+        EnterpriseEdition.CustomMetadata enterpriseMetadata = enterpriseEdition.getCustomMetadata();
+
+        if (enterpriseMetadata != null && premiumMetadata != null) {
+            // Copy autoUpdateMetadata setting
+            if (!premiumMetadata.isAutoUpdateMetadata()
+                    && enterpriseMetadata.isAutoUpdateMetadata()) {
+                premiumMetadata.setAutoUpdateMetadata(true);
+            }
+
+            // Copy author if not set in premium but set in enterprise
+            if ((premiumMetadata.getAuthor() == null
+                            || premiumMetadata.getAuthor().trim().isEmpty()
+                            || "username".equals(premiumMetadata.getAuthor()))
+                    && enterpriseMetadata.getAuthor() != null
+                    && !enterpriseMetadata.getAuthor().trim().isEmpty()) {
+                premiumMetadata.setAuthor(enterpriseMetadata.getAuthor());
+            }
+
+            // Copy creator if not set in premium but set in enterprise and different from default
+            if ((premiumMetadata.getCreator() == null
+                            || "Stirling-PDF".equals(premiumMetadata.getCreator()))
+                    && enterpriseMetadata.getCreator() != null
+                    && !"Stirling-PDF".equals(enterpriseMetadata.getCreator())) {
+                premiumMetadata.setCreator(enterpriseMetadata.getCreator());
+            }
+
+            // Copy producer if not set in premium but set in enterprise and different from default
+            if ((premiumMetadata.getProducer() == null
+                            || "Stirling-PDF".equals(premiumMetadata.getProducer()))
+                    && enterpriseMetadata.getProducer() != null
+                    && !"Stirling-PDF".equals(enterpriseMetadata.getProducer())) {
+                premiumMetadata.setProducer(enterpriseMetadata.getProducer());
+            }
+        }
     }
 }