[dev] Add error handling for sync message failures

[Trolldemorted]

• I have searched open and closed issues for duplicates

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Bug description

What happens at the moment is perfectly described in #1387

[scottnonnenberg]

So what is the actual feature request here? If a sync message fails, do we continuously retry it? Give you a button to retry?

It would also be helpful if you could provide a couple scenarios which would be helped with this. Is it that your other devices have inconsistent conversation history? Or is it other kinds of sync messages you're concerned with?

[Trolldemorted]

So far I am only concerned about synced outgoing text messages for the siblings' conversation history, because S-D can only send those if I am correct (?).

A resend button would suffice, I suppose?

If you ever want to support modifying groups on S-D, you will need to ensure that the group updates will arrive on your sibling devices too. If it silently fails your devices will have a disjoint view of the group.

[GuillaumeAmat]

I'm experiencing issues on the conversation history. Some messages (sent by me and by my contacts) do not appear on Signal Desktop whereas they are present on my Android phone.

[scottnonnenberg]

@GuillaumeAmat Please enter a new issue describing your behavior, and be sure to include logs from both devices.