1.1.2: appstore.cpp: rework download path + CLI fixes

- drop legacy hardcoded volumeStore (MZFinance) path
- stateless cascade: volumeStoreDownloadProduct → redownloadProduct → updateProduct (all endpoints from the bag)
- fix output filename (bundleDisplayName + space + version, no id; -o verbatim)
- purchase: add -f/--force, apply --debug