signer: Capture signer rejections and report them #483
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We want to capture policy signer rejections too, as they can help us identify problems for false negatives, and can be used to fine-tune policies, or act as a regression test suite should the rejection be a true positive.
Sadly we were not actually sending a rejection, due to a misplaces
?
that'd bubble up the error past the reporting spot. This PR addresses that by handling the response in a more fine-grained manner.