Update app.py

app.py

@@ -43,7 +43,7 @@ class OntologyRegistry:
 
 class RelationshipEngine:
     def __init__(self, db_path=':memory:'):
-        self.conn = sqlite3.connect(db_path)
+        self.conn = sqlite3.connect(db_path, check_same_thread=False)  # Add this flag
         self.setup_database()
 
     def setup_database(self):