Refactor and secure backend configuration, DTOs, and authentication flow

- Updated pom.xml: removed redundant tags, grouped dependencies, added scopes, and upgraded plugins
- Enhanced RegisterUserDto with validation annotations and added missing fields (username, fullname)
- Updated User entity with builder constructor and removed redundant getters/setters
- Completed FileMetadata entity with Lombok and required setters/getters
- Improved HDFSConfig with correct annotation and clearer exception message
- Adjusted HTTP to HTTPS redirect port (8085 -> 8443)
- Allowed /actuator/** in SecurityConfig and disabled deprecated XSS protection
- Skipped JWT filter for /api/auth and /actuator paths
- Refactored AuthenticationService to use builder pattern and RSA key injection
- Fixed application.properties for static MySQL connection (removed ${MYSQL_PASSWORD})

src/main/java/com/skycrate/backend/skycrateBackend/security/JwtAuthenticationFilter.java

@@ -37,6 +37,12 @@ public class JwtAuthenticationFilter extends OncePerRequestFilter {
                                     FilterChain filterChain)
             throws ServletException, IOException {
 
+        String path = request.getRequestURI();
+        if (path.startsWith("/api/auth") || path.startsWith("/actuator")) {
+            filterChain.doFilter(request, response);
+            return;
+        }
+
         final String authHeader = request.getHeader("Authorization");
         final String jwt;
         final String userEmail;

src/main/java/com/skycrate/backend/skycrateBackend/security/RateLimiterService.java

@@ -1,35 +0,0 @@
-package com.skycrate.backend.skycrateBackend.security;
-
-import com.github.benmanes.caffeine.cache.Cache;
-import com.github.benmanes.caffeine.cache.Caffeine;
-import org.springframework.stereotype.Service;
-
-import java.util.concurrent.TimeUnit;
-
-@Service
-public class RateLimiterService {
-
-    private final Cache<String, Integer> attemptsCache;
-
-    private static final int MAX_ATTEMPTS = 5;
-
-    public RateLimiterService() {
-        this.attemptsCache = Caffeine.newBuilder()
-                .expireAfterWrite(1, TimeUnit.MINUTES)
-                .build();
-    }
-
-    public boolean isBlocked(String key) {
-        Integer attempts = attemptsCache.getIfPresent(key);
-        return attempts != null && attempts >= MAX_ATTEMPTS;
-    }
-
-    public void recordFailedAttempt(String key) {
-        int attempts = attemptsCache.getIfPresent(key) == null ? 0 : attemptsCache.getIfPresent(key);
-        attemptsCache.put(key, attempts + 1);
-    }
-
-    public void resetAttempts(String key) {
-        attemptsCache.invalidate(key);
-    }
-}