getReadTargetPath abstract method
Gets the path for reading a model file with given filename.
On desktop (macOS/Windows/Linux) performs a legacy-Documents fallback
probe so that models installed before 0.15.1 (which stored everything
in ~/Documents/) continue to load on upgrade without a forced
re-install. A single debug log is emitted per unique legacy path to
nudge the user to re-install.
Writers must use getWriteTargetPath instead.
Implementation
Future<String> getReadTargetPath(String filename);