Automatic Reupload Attempts for Failed Descriptors

Description

From the Security page:

If descriptor uploads fail due to network issues or relay unavailability, administrators must manually restart the process. Automating reuploads would improve reliability.

This seems to be happening because:

• Function upload_descriptor() may raise stem.InvalidRequest and stem.ProtocolError.
• But these exceptions aren't handled by OnionbalanceService._publish_descriptor.

Tasks

• Properly act on stem.InvalidRequest and stem.ProtocolError exceptions.
• Update the Security page accordingly.

Time estimation

• Complexity: very small (0.5 day)
• Uncertainty: low (x1.1)
• Reference (adapted)