refactor(config): require explicit BZOD data directory

tests/v08_phase6a_elimination_tests.rs

@@ -20,8 +20,7 @@ use uuid::Uuid;
 fn create_test_config() -> (PathBuf, Config) {
     let temp_dir = std::env::temp_dir().join(format!("bzod_p6a_test_{}", Uuid::new_v4()));
     fs::create_dir_all(&temp_dir).unwrap();
-    let mut config = Config::load();
-    config.data_dir = temp_dir.clone();
+    let mut config = Config::load_with_cli(Some(&temp_dir)).unwrap();
     config.backup_dir = temp_dir.join("backups");
     config.base_url = Some("http://localhost:8080".to_string());
     (temp_dir, config)