SD Offload 1.7.20

When an offload finishes, the Library now opens the newest verified capture day in that batch. Previously it chose whichever day had the most photos, which could be much older. The fix supports all preset/custom date layouts, legacy records, duplicate photos, and already-wiped files using the saved destination paths without another NAS scan.

Validation: 182 automated tests passed; one optional live-provider test skipped. Six new regressions include reproducing the older-day bug and loading the newest folder's photos. GitHub CI also passed all ten disposable transfer/erasure integration modes. README and changelog updated.

Downloads include the DMG, ZIP, and SHA256SUMS.txt. The app is ad-hoc signed and not notarized; downloaded copies may require the Gatekeeper steps in the installation guide.