refactor(config): require explicit BZOD data directory

tests/v08_tenant_boundary_tests.rs

@@ -15,8 +15,7 @@ use std::time::Instant;
 fn temp_config() -> (PathBuf, Config) {
     let temp_dir = std::env::temp_dir().join(format!("bzod_v08_boundary_{}", uuid::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");
     (temp_dir, config)
 }