feat: add config to skip certain attributes

bukkit/src/main/java/net/william278/husksync/data/BukkitData.java

@@ -678,12 +678,14 @@ public abstract class BukkitData implements Data {
         private List<Attribute> attributes;
 
         @NotNull
-        public static BukkitData.Attributes adapt(@NotNull Player player) {
+        public static BukkitData.Attributes adapt(@NotNull Player player, @NotNull HuskSync plugin) {
             final List<Attribute> attributes = Lists.newArrayList();
             Registry.ATTRIBUTE.forEach(id -> {
                 final AttributeInstance instance = player.getAttribute(id);
-                if (instance == null || instance.getValue() == instance.getDefaultValue()) {
+                if (instance == null || instance.getValue() == instance.getDefaultValue() || plugin
-                    return; // We don't sync unmodified attributes
+                        .getSettings().getSynchronization().isIgnoredAttribute(id.getKey().toString())) {
+                    // We don't sync unmodified or disabled attributes
+                    return;
                 }
                 attributes.add(adapt(instance));
             });

bukkit/src/main/java/net/william278/husksync/data/BukkitUserDataHolder.java

@@ -121,7 +121,7 @@ public interface BukkitUserDataHolder extends UserDataHolder {
     @NotNull
     @Override
     default Optional<Data.Attributes> getAttributes() {
-        return Optional.of(BukkitData.Attributes.adapt(getBukkitPlayer()));
+        return Optional.of(BukkitData.Attributes.adapt(getBukkitPlayer(), getPlugin()));
     }
 
     @NotNull

common/src/main/java/net/william278/husksync/config/Settings.java

@@ -255,9 +255,6 @@ public class Settings {
         @Comment("Persist maps locked in a Cartography Table to let them be viewed on any server")
         private boolean persistLockedMaps = true;
 
-        @Comment("Whether to synchronize player max health (requires health syncing to be enabled)")
-        private boolean synchronizeMaxHealth = true;
-
         @Comment("If using the DELAY sync method, how long should this server listen for Redis key data updates before "
                 + "pulling data from the database instead (i.e., if the user did not change servers).")
         private int networkLatencyMilliseconds = 500;
@@ -273,6 +270,11 @@ public class Settings {
         @Getter(AccessLevel.NONE)
         private Map<String, String> eventPriorities = EventListener.ListenerType.getDefaults();
 
+        @Comment({"For attribute syncing, which attributes should be ignored/skipped when syncing",
+                "(e.g. \"minecraft:generic.max_health\", \"minecraft:generic.attack_damage\")"})
+        @Getter(AccessLevel.NONE)
+        private List<String> ignoredAttributes = new ArrayList<>(List.of(""));
+
         public boolean doAutoPin(@NotNull DataSnapshot.SaveCause cause) {
             return autoPinnedSaveCauses.contains(cause.name());
         }
@@ -281,6 +283,10 @@ public class Settings {
             return id.isCustom() || features.getOrDefault(id.getKeyValue(), id.isEnabledByDefault());
         }
 
+        public boolean isIgnoredAttribute(@NotNull String attribute) {
+            return ignoredAttributes.contains(attribute);
+        }
+
         @NotNull
         public EventListener.Priority getEventPriority(@NotNull EventListener.ListenerType type) {
             try {