Issues whose strategy raised an error (returned ok: false
from apply). Each entry carries the strategy's description
and the error message so calling code can log / present them.
Issues whose strategy returned {fixed: true}.
Issues that couldn't be auto-fixed — either no registered
strategy matched the code, or the strategy returned
{fixed: false} without raising an error. Callers typically
surface these to a user with the issue list, the way an IDE
shows "could not auto-fix N problems".
Result of applyFixes.