-- How long a phase has been waiting on a judge it cannot reach.
--
-- `Verdict.error` distinguishes "could not judge" from "judged incomplete", and
-- until now nothing acted on it: an unreachable judge counted as a failed pass,
-- so an outage on the validator's side spent the phase's iteration budget.
-- Mission 01a011bf lost its script phase that way — the work was done and
-- committed, glm-5.3 returned "transport error: error decoding response body",
-- and with two passes budgeted that one unreachable judge failed the phase.
--
-- Not consuming the pass is right, but it cannot mean retrying forever: a
-- permanently unreachable judge would leave the phase `evaluating` in silence,
-- which trades a wrong failure for an invisible hang. This column is the clock
-- that bounds the wait, exactly as `capacity_blocked_since` bounds a phase
-- waiting for a VM slot.
--
-- Set on the first unreachable verdict, cleared the moment a real verdict
-- lands. NULL therefore means "not currently blocked", not "never was".
ALTER TABLE mission_phases
    ADD COLUMN IF NOT EXISTS judge_blocked_since TIMESTAMPTZ;

COMMENT ON COLUMN mission_phases.judge_blocked_since IS
    'When this phase first got an unreachable-judge verdict. Cleared when a real verdict lands; bounds how long an evaluating phase may wait before it is failed with the transport reason.';