0e65a548f2
Three changes that together eliminate the "Checking…" stall and excessive NAS rescanning without requiring a database migration: NASManifestCache: extend stale threshold from 5 min to 30 min. directoryCount is now updated incrementally after every upload, and PHPhotoLibraryChangeObserver keeps LocalPhotoIndex current — a full NAS roundtrip every 5 min was redundant and forced the expensive reconcile path far more often than necessary. BackupStatusService: add withTimeout(_:work:) using a racing ThrowingTaskGroup so NAS operations (SMB connect, manifest download, directory listing) fail fast instead of hanging indefinitely when the NAS is slow or unreachable. Timeouts: 15s for connect, 12s for manifest download, 12s for directory listings. On timeout, BackupError.timeout is caught separately to preserve cached counts instead of marking connectionState = .offline. BackupStatusService: call LocalPhotoIndex.shared.loadOrBuild() at the start of performRefresh before checking localIndexCount. Without this, AppDelegate's concurrent loadOrBuild() task races with the first onActive() trigger; if it loses, localIndexCount == 0 and the fast path is bypassed, forcing a full NAS roundtrip on every cold launch. Co-Authored-By: Kutesir <kutesir@provoc.ug> Co-Authored-By: Sentry <sentry@provoc.ug>