refactor(storage): extract and enhance more common logic for kuzu

src/base/spec.rs

@@ -406,6 +406,16 @@ pub struct IndexOptions {
     pub vector_indexes: Vec<VectorIndexDef>,
 }
 
+impl IndexOptions {
+    pub fn primary_key_fields(&self) -> Result<&[FieldName]> {
+        Ok(self
+            .primary_key_fields
+            .as_ref()
+            .ok_or(api_error!("Primary key fields are not set"))?
+            .as_ref())
+    }
+}
+
 impl fmt::Display for IndexOptions {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let primary_keys = self

src/ops/storages/mod.rs

@@ -1,4 +1,5 @@
+mod shared;
+
 pub mod neo4j;
 pub mod postgres;
 pub mod qdrant;
-pub mod shared;