fix(syncthing): apply folder migrations with temporary API/GUI server (#10330)

Prevent the feeling that nothing is happening / it's not starting.

Signed-off-by: Jakob Borg <jakob@kastelo.net>

internal/db/sqlite/db_open.go

@@ -86,6 +86,10 @@ func Open(path string, opts ...Option) (*DB, error) {
 		slog.Warn("Failed to clean dropped folders", slogutil.Error(err))
 	}
 
+	if err := db.startFolderDatabases(); err != nil {
+		return nil, wrap(err)
+	}
+
 	return db, nil
 }