refactor(config): require explicit BZOD data directory

tests/backup_restore_tests.rs

@@ -7,8 +7,7 @@ use tar::Archive;
 use zstd::Decoder;
 
 fn create_temp_config(temp_dir: PathBuf) -> Config {
-    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.clone();
     config.base_url = Some("http://bzo.in".to_string());
     config
@@ -200,8 +199,7 @@ async fn test_restore_slug_collision_rejection() {
     ));
     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");
     fs::create_dir_all(&config.backup_dir).unwrap();