fix: return True upon successful delete operation

- Ensure `delete` method returns True to confirm deletion.
- Added a test to verify deletion behavior and return value.

Generated-by: aiautocommit

activemodel/base_model.py

@@ -168,7 +168,7 @@ def delete(self):
 
             session.delete(self)
             session.commit()
-            session.refresh(self)
+            return True
 
     def save(self):
         with get_session() as session:

test/delete_test.py

@@ -0,0 +1,19 @@
+from activemodel import BaseModel
+from activemodel.mixins import TypeIDMixin
+
+TYPEID_PREFIX = "myid"
+
+
+class ExampleWithId(BaseModel, TypeIDMixin(TYPEID_PREFIX), table=True):
+    pass
+
+
+def test_delete(create_and_wipe_database):
+    example = ExampleWithId().save()
+
+    assert ExampleWithId.count() == 1
+
+    result = example.delete()
+
+    assert ExampleWithId.count() == 0
+    assert result is True