TrainPerson now opens the person's own sync database in their folder,
halkyon_app's SyncService behind AppCompatibility (the module's basics'
minimumAppBuild against the build package_info_plus reads), their key
and their workouts, and closes them in that order, the key last. As in
Learn, a person's data waits for the one before to close, since signing
in again opens the same database. The pubspec's dependencies are sorted
again (clock had gone before flutter).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>