- treat validation errors of the result of write_ and read_ messages
properly
- add info about the called read_* and write_ methods to the error
message, in case the error is not raised in the outmost method
- as subsequent errors in poll functions are logged only once, log an
info when a poll function succeeds again
- remove DiscouragedConversion error
Change-Id: Ib66e001cc95de8225751a1464a92594c369ceb3f
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/30788
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>