- config: add optional configPaths parameter to load() for test isolation (tests now use t.TempDir() to avoid interference from D:\app\data) - handler: fix stubAccountRepoForHandler.ListByPlatform to return accounts (was returning nil, nil causing "no available accounts" errors) - logger: fix Sync() blocking on Windows pipes by closing write end first (also add Reset() function to close lumberjack file handles for cleanup)