attach: introduce builtin attach command
#399
| Job | Run time |
|---|---|
| 4s | |
| 10m 59s | |
| 0s | |
| 11m 18s | |
| 3m 25s | |
| 8m 58s | |
| 4m 9s | |
| 57m 35s | |
| 19m 18s | |
| 16m 57s | |
| 14m 2s | |
| 19m 0s | |
| 14m 7s | |
| 32m 55s | |
| 42m 47s | |
| 5m 58s | |
| 3m 59s | |
| 0s | |
| 11m 47s | |
| 12m 19s | |
| 7m 54s | |
| 7m 47s | |
| 10m 0s | |
| 9m 56s | |
| 12m 40s | |
| 9m 14s | |
| 12m 53s | |
| 11m 19s | |
| 6h 11m 20s |