test: fix Bruno auth test sequence and add registration data

Correct the sequence numbers for logout and refresh token tests.
Add sample registration data to the Register User test.

bruno/user/auth/Logout User.yml

@@ -1,7 +1,7 @@
 info:
   name: Logout User
   type: http
-  seq: 1
+  seq: 3
 http:
   method: POST
   url: '{{base_url}}/api/auth/logout'

bruno/user/auth/Refresh Token.yml

@@ -1,7 +1,7 @@
 info:
   name: Refresh Access Token
   type: http
-  seq: 1
+  seq: 4
 
 http:
   method: POST

bruno/user/auth/Register User.yml

@@ -8,7 +8,14 @@ http:
   url: "{{base_url}}/api/auth/register"
   body:
     type: json
-    data: ""
+    data: |-
+      {
+        "username": "testuser",
+        "email": "testuser@example.com",
+        "password": "Test@Pass123!",
+        "first_name": "Test",
+        "last_name": "User"
+      }
   auth: inherit
 
 runtime: