Follow-up to the cherry-picked CLI judge gate (#55854): the gate carried
the same 3-value unpack bug just fixed on the tool path in PR #67973 —
the ValueError would have been swallowed by the fail-open handler,
silently disabling the gate.
Also: test mock now returns the real 4-value judge contract (the old
3-value mock masked the bug), tests track complete_task invocations and
assert the rejection path never writes, and the unused _make_goal_task
helper is dropped.
34a304abb3