fix(core): Correct MutableStructuredConfigEntry#apply return type to self

CHANGELOG.md

@@ -15,6 +15,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `weaver-pojo`: Make maps with string keys into their own weavable entry type.
 - `weaver-pojo-serde-ext`: Such string map entries get serde using the `MutableStructuredConfigEntry` interface.
 
+### Fixed
+
+- `core`: Fixed return type of `MutableStructuredConfigEntry#apply` to correctly be itself.
+
 ## [0.8.1] - 2026-04-26
 
 ### Fixed

tweed5/core/src/main/java/de/siphalor/tweed5/core/api/entry/MutableStructuredConfigEntry.java

@@ -6,7 +6,7 @@ import java.util.function.Consumer;
 
 public interface MutableStructuredConfigEntry<T> extends AddressableStructuredConfigEntry<T> {
 	@Override
-	default AddressableStructuredConfigEntry<T> apply(Consumer<ConfigEntry<T>> function) {
+	default MutableStructuredConfigEntry<T> apply(Consumer<ConfigEntry<T>> function) {
 		AddressableStructuredConfigEntry.super.apply(function);
 		return this;
 	}