test: improve vault password file errors by propagating up

src/config/app_state.rs

@@ -43,7 +43,7 @@ impl AppState {
         start_mcp_servers: bool,
         abort_signal: AbortSignal,
     ) -> Result<Self> {
-        let vault = Arc::new(Vault::init(&config));
+        let vault = Arc::new(Vault::init(&config)?);
 
         let mcp_registry = McpRegistry::init(
             log_path,

src/config/mod.rs

@@ -490,7 +490,7 @@ impl Config {
             secrets_provider: config.secrets_provider.clone(),
             ..AppConfig::default()
         };
-        let vault = Vault::init(&bootstrap_app);
+        let vault = Vault::init(&bootstrap_app)?;
         let (parsed_config, missing_secrets) = interpolate_secrets(&content, &vault)?;
         if !missing_secrets.is_empty() && !info_flag {
             debug!(