refactor: update header names to align with project rebranding and add remote URL accessor

Author: marioserrano09

extensions/entity-files/sources/core/src/main/java/tools/dynamia/modules/entityfile/remote/RemoteEntityFileStorage.java

@@ -72,8 +72,8 @@ public class RemoteEntityFileStorage implements EntityFileStorage {
     public static final String SFS_SECRET = "SFS_SECRET";
 
     // ── Header names ─────────────────────────────────────────────────────────
-    static final String HEADER_IDENTITY = "X-SFS-Identity";
-    static final String HEADER_SECRET = "X-SFS-Secret";
+    static final String HEADER_IDENTITY = "X-Buckie-Identity";
+    static final String HEADER_SECRET = "X-Buckie-Secret";
     private final LocalEntityFileStorage localEntityFileStorage;
     private final Parameters appParams;
     private final CrudService crudService;
@@ -338,6 +338,10 @@ public Resource toResource() {
             return fetchResource(remoteUrl);
         }
 
+        public String getRemoteUrl() {
+            return remoteUrl;
+        }
+
         @Override
         public Resource toThumbnailResource(int width, int height) {
             return fetchResource(remoteUrl + "?w=" + width + "&h=" + height);