Fix get_attribute_history query to not use template_id column

backend/db_manager.py

@@ -829,9 +829,8 @@ class DatabaseManager:
         where_clause = " AND ".join(conditions) if conditions else "1=1"
         
         rows = conn.execute(
-            f"""SELECT ah.*, at.name as template_name
+            f"""SELECT ah.*
                 FROM attribute_history ah
-                JOIN attribute_templates at ON ah.template_id = at.id
                 WHERE {where_clause}
                 ORDER BY ah.changed_at DESC LIMIT ?""",
             params + [limit]