Fix: string comparison and formatting inconsistencies in CompressController (#3168)

# Description of Changes

Please provide a summary of the changes, including:

- Replaced `format.equals("jpeg")` with `"jpeg".equals(format)` to
prevent potential `NullPointerException`
- Standardized percentage reduction logging by formatting values before
passing them into the log statement
- Fixed inconsistent formatting in log messages by replacing `{:.1f}%`
with pre-formatted string values

`63.32 MB → 61.77 MB (reduced by {:.1f}%)` -> `63.32 MB → 61.77 MB
(reduced by 2.5%)`

These changes improve code robustness and ensure consistent logging
output.

---

## 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/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)
- [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/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.

build.gradle

@@ -289,12 +289,15 @@ tasks.wrapper {
 //    options.compilerArgs << "-Xlint:deprecation"
 //}
 configurations.all {
+    // Remove all commons-logging dependencies so that only spring-jcl is used
+    exclude group: 'commons-logging', module: 'commons-logging'
+    // Exclude Tomcat
     exclude group: "org.springframework.boot", module: "spring-boot-starter-tomcat"
 }
 dependencies {
 
     //tmp for security bumps
-	implementation 'ch.qos.logback:logback-core:1.5.17'
+    implementation 'ch.qos.logback:logback-core:1.5.17'
     implementation 'ch.qos.logback:logback-classic:1.5.17'