fix(extract): emit Java enum and annotation declarations as type nodes (#1512)

Java `enum` and `@interface` (annotation) declarations weren't in _JAVA_CONFIG's
class_types, so they were never emitted as type nodes — a field typed as an enum or
a class annotated with a project annotation referenced a node that didn't exist
(dangling). enum_declaration and annotation_type_declaration are now extracted as
first-class (sourced) type nodes, so those references resolve onto them.

Ported from PR #1513 by @oleksii-tumanov.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

graphify/extract.py

@@ -2065,7 +2065,11 @@ _JAVA_CONFIG = LanguageConfig(
     ts_module="tree_sitter_java",
     # record_declaration shares class_declaration's name/body/interfaces fields,
     # so it becomes a first-class type node instead of an isolated file (#1373).
-    class_types=frozenset({"class_declaration", "interface_declaration", "record_declaration"}),
+    # Enums and annotation declarations use the same name/body contract.
+    class_types=frozenset({
+        "class_declaration", "interface_declaration", "record_declaration",
+        "enum_declaration", "annotation_type_declaration",
+    }),
     function_types=frozenset({"method_declaration", "constructor_declaration"}),
     import_types=frozenset({"import_declaration"}),
     # object_creation_expression (`new Foo(...)`) is handled by a dedicated Java

tests/test_languages.py

@@ -399,6 +399,36 @@ def test_java_type_annotations_have_attribute_context(tmp_path):
     assert ("CheckoutService", "Entity") in refs
 
 
+def test_java_enum_and_annotation_declarations_are_type_nodes(tmp_path):
+    source = tmp_path / "TypeDeclarations.java"
+    source.write_text(
+        "enum PaymentStatus { PENDING, PAID }\n"
+        "@interface Audited {}\n"
+        "class Order { PaymentStatus status; }\n"
+        "@Audited class CheckoutService {}\n"
+    )
+
+    result = extract_java(source)
+
+    assert ("TypeDeclarations.java", "PaymentStatus") in _edge_labels(
+        result, "contains"
+    )
+    assert ("TypeDeclarations.java", "Audited") in _edge_labels(result, "contains")
+    assert ("Order", "PaymentStatus") in _edge_labels(
+        result, "references", "field"
+    )
+    assert ("CheckoutService", "Audited") in _edge_labels(
+        result, "references", "attribute"
+    )
+    definitions = {
+        node["label"]: node
+        for node in result["nodes"]
+        if node.get("label") in {"PaymentStatus", "Audited"}
+    }
+    assert definitions["PaymentStatus"].get("source_file") == str(source)
+    assert definitions["Audited"].get("source_file") == str(source)
+
+
 def test_csharp_field_type_references_have_field_context():
     r = extract_csharp(FIXTURES / "sample.cs")
     refs = _references(r)