2. fixed tape changing issue (tape unmount makes drive irresponsible for 2 minutes)

1) more control over copy queue (but still single sequencing result can be placed to two tapes if compression fails).
2) tape change bug
3) graceful stop

serious fragmentation issue semi-fixed (now it's isolated to 2 tapes exactly; it was all tapes at once)

1. Separate os-daemon for backup process
2. reviewed the logics (only management is now in REST; the actual backup only local
3. Pausing logics seems to be clear now

Tape operations almost finished (added: state automata check; mount/format with prechecks; tape status)

2. BackupTarget route works correctly too.

2. Present tapes are malfunctioning; some stupid error obv.