test(llm-judge): sample every judge as a pre-registered 3-sample panel

Each of the 24 skill-llm-eval judges now draws EVAL_POLICY.judge.samples
independent samples of the same prompt concurrently inside the unchanged
JUDGE_MS budget. Numeric dimensions gate on the per-dimension panel mean
against the unchanged threshold; booleans (would_browse, consistent) on a
strict majority. An erroring sample fails the whole panel and is never
resampled; a refusal is an unscored panel only when every sample refused.
callJudge's 429 backoff stays: it is transport before any model output.

The workflow-judge cache stores and validates only complete panels, and its
identity now records the panel and zero file retries. Harness tests that
pinned one provider call per case now pin the panel size.

test/helpers/periodic-exclude-data.ts

@@ -72,7 +72,12 @@ export const CASE_CI_EXCLUDE: Record<string, { reason: string; tracking: string
  *                 new-policy trials; exit at >= `exit.rate` over >=
  *                 `exit.minTrials`; at most `capFraction` of each tier's
  *                 blocking cases; an entry expires after `expiryWeeklyRuns`.
- *   drift       - one-sided Fisher exact alarm between input-identity series.
+ *   judge       - a judge case draws `samples` independent samples of one
+ *                 prompt concurrently; numeric dimensions gate on the panel
+ *                 mean against the unchanged threshold, booleans on a strict
+ *                 majority; an erroring sample fails the panel, never resampled.
+ *   drift       - one-sided Fisher exact alarm between input-identity series
+ *                 (Holm-controlled across the cases tested in one report).
  *   infraRedispatch - a census whose every red verdict is machine-classified
  *                 INFRA or INCOMPLETE may be re-dispatched this many times as
  *                 a new run; both runs are reported.
@@ -86,6 +91,7 @@ export const EVAL_POLICY = {
     capFraction: 0.10,
     expiryWeeklyRuns: 8,
   },
+  judge: { samples: 3 },
   drift: { fisherAlpha: 0.05, fisherMinPerSide: 6 },
   infraRedispatch: 1,
 } as const;