MAESTRO-3100 Attempt to better-handle the funky encoding returned by non-encoding-aware gems.
These gems typically return strings encoded as 'ASCII-8BIT' and there doesn't seem to be a default encoder for that, since it is essentially 'byte stream'.
So what we do is attempt to just force the encoding to 'utf-8', and if that works, all good.  Alternatively we try to strip out any top-bit set chars, and finally we just substitute a redacted message so the task can at least continue - even if the output is a whole stream of redacted text