Add a newline to the log before reprocessing a run

[JamesWrigley]

This could probably be done more cleanly by changing formatters, but it looks ok:

│2023-11-01 12:59:10,455 INFO damnit.backend.extract_data: Sent Kafka update to topic 'amore-db-b785369a10c9a0919f685924a587de9d2395ac6d'                                                                                                     │
│2023-11-01 13:05:05,053 INFO damnit.backend.extract_data:                                                                                                                                                                                    │
│                                                                                                                                                                                                                                             │
│----- Reprocessing r14 (p4442) -----                                                                                                                                                                                                         │
│INFO:extra_data.read_machinery:Found proposal dir '/gpfs/exfel/exp/MID/202302/p004442' in 0.0036 s                                                                                                                                           │
│Loading 94 aliases from: /gpfs/exfel/exp/MID/202302/p004442/usr/extra-data-aliases.yml

(note that the log line above the newline is from the current reprocessing job)

[takluyver]

Thanks, LGTM