Release Name: NiDB v2026.8.1538 (v2026.8.1538)

Notes:
[new] Redcap import - Redcap->NiDB mapping, and import redcap fields into NiDB observations
[new] Avicenna imports - drag and drop
[new] Reorganized project checklists
[fix] DCMTK tag reading - DCMTK would always try to read a binary file, whether it was DICOM or not
[fix] Many bug and security fixes, removed unused code
[update] added SafeDeletePath() in most locations in C++ code
[update] squirrel library to latest version