[EASY] Don't report encoding errors for merged solutions #3084
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Description
The majority of solutions that get discarded due to failing encoding/simulating/scoring are actually merged solutions. These solutions get merged by the driver and not by the solver. The driver does it naively so it's not really surprising that it tries to merge solutions which are incompatible (e.g. they could use the same liquidity source).
Changes
To avoid alerting on false positives the solver has no control over we now only report solutions that come directly from the solver in a non-working state (i.e. only 1 sub-solution contained).