Explain constraint errors with signatures#2751
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The type troubleshooting page explained how to inspect imported signatures, but it did not cover simultaneous constraint errors where an unknown solver type is related to a concrete expected type. Ask Acton was then treating those errors as missing inference even when an inherited method signature already fixed the parameter type. Add a neutral example where an override selects item attributes on a context value. The guide now shows how to read the concrete type at the bottom of the constraint set, inspect that exact type with acton sig, and compare the selected attributes against the compiler-visible interface.
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Explain how to debug simultaneous constraint errors where an unknown solver type is related to a concrete expected type. The new guide example shows how to inspect the exact concrete type with
acton sig, compare its compiler-visible interface with the selected attributes, and recognize when code is selecting attributes on the wrong value.