The outer catch's overwrite guard checked `!outcome.error`, but outcome.error
is always truthy (even the default placeholder string), so an exception
occurring outside the two explicitly-guarded blocks (e.g. a .fill()/.click()
timeout) would leave the generic "Test did not complete" message instead of
the real error. Replaced with an explicit outcomeFinalized sentinel that is
set exactly where outcome is deliberately finalized (missing env var, login
timeout, post-submission timeout, success), so any other exception correctly
falls through to the catch-all branch with its real message.