fix: correct tests following strict removal of legacy json aliases

server/src/handlers/graph.rs

@@ -1369,10 +1369,9 @@ mod tests {
             .unwrap();
         assert!(res.contains("Successfully created 1 relation(s)"));
 
-        // Test serde field aliases (source/target/relationType mapped to from/to/relation_type)
         let alias_args = json!({
             "relations": [
-                {"source": "A", "target": "B", "relationType": "knows"}
+                {"from": "A", "to": "B", "relation_type": "knows"}
             ]
         });
         let alias_res = handler.execute(alias_args, state.clone()).await.unwrap();