Add more logging and ensure that stages that use network are retried before failing.

[fbessou]

No description provided.

[github-actions]

Unit tests Coverage

File	Stmts	Miss	Cover	Missing
__init__.py	0	0	100%
__main__.py	42	23	45%	16–17, 24, 51–52, 54, 56, 62–65, 68, 72–76, 78–82, 86
application.py	53	35	33%	27–30, 33–38, 40–41, 44–45, 47–48, 50–53, 57–59, 65–66, 72, 78–86
config.py	41	1	97%	50
events.py	19	0	100%
mapping.py	61	22	63%	47, 60, 63–69, 72, 75, 84, 97, 100–107, 117
pulse_worker.py	40	15	62%	13, 25–27, 37, 42, 45, 48–55
repo_synchronizer.py	73	7	90%	43–44, 62, 64–66, 175
retry.py	19	2	89%	40, 47
TOTAL	348	105	69%

JUnit Xml Summary

Tests	Skipped	Failures	Errors	Time
13	2 💤	0 ❌	0 🔥	4.251s ⏱️

[github-actions]

Integration tests Coverage

File	Stmts	Miss	Cover	Missing
__init__.py	0	0	100%
__main__.py	42	14	66%	16–17, 24, 72–76, 78–82, 86
application.py	53	13	75%	34–38, 65–66, 72, 79–81, 85–86
config.py	41	1	97%	50
events.py	19	0	100%
mapping.py	61	5	91%	47, 64, 68, 101, 105
pulse_worker.py	40	2	95%	13, 37
repo_synchronizer.py	73	7	90%	43–44, 62, 64–66, 175
retry.py	19	2	89%	40, 47
TOTAL	348	44	87%

JUnit Xml Summary

Tests	Skipped	Failures	Errors	Time
13	0 💤	0 ❌	0 🔥	6.180s ⏱️

[djangoliv]

Thanks

[globau]

As this conflicts with #21, I'll get #21 landed then fix and apply the changes from this PR (likely in a new one).