feat(skillrack): add SkillRack leaderboard with server-side login, AES-encrypted credential storage, Jsoup HTML scraping, daily auto-sync, and full frontend tab with registration modal

backend/pom.xml

@@ -69,6 +69,13 @@
             <artifactId>spring-boot-starter-validation</artifactId>
         </dependency>
 
+        <!-- Jsoup HTML Parser for SkillRack profile scraping -->
+        <dependency>
+            <groupId>org.jsoup</groupId>
+            <artifactId>jsoup</artifactId>
+            <version>1.18.1</version>
+        </dependency>
+
         <!-- Spring Boot Starter Test -->
         <dependency>
             <groupId>org.springframework.boot</groupId>