fix: address infinite recursion in EfUser serialization

The new helper method to get the public facing model of a user object
was being called during serialization, and since it returns a copy of
itself, it created a crash loop. Adding JSONIgnore forces the method to
be ignored which resolves the issue.

efservices/src/main/java/org/eclipsefoundation/efservices/api/models/EfUser.java

@@ -70,10 +70,12 @@ public record EfUser(String uid, String name, String picture, String mail, Eca e
     }
 
     /**
-     * Converts the user profile to the restricted public view.
+     * Converts the user profile to the restricted public view. Json Ignore is super important, as otherwise this will recursively add
+     * itself to json and crash.
      * 
      * @return current user profile, with the private data blanked out.
      */
+    @JsonIgnore
     public EfUser getPublicProfile() {
         return EfUserBuilder
                 .builder(this)