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.

scripts/typecheck-test-baseline.json

@@ -261,7 +261,6 @@
     "test/helpers/shared-libs-eval-fixture.ts\tTS7006\tParameter 'candidate' implicitly has an 'any' type.": 2,
     "test/helpers/shared-libs-path-fixture.ts\tTS2352\tConversion of type '{ root: string; repo: string; state: string; env: { GSTACK_HOME: string; }; }' to type 'SharedLibsFixture' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first. Type '{ root: string; repo: string; state: string; env: { GSTACK_HOME: string; }; }' is missing the following properties from type 'SharedLibsFixture': bin, trace, hookTrace, tip": 1,
     "test/helpers/shared-libs-plan-actor.ts\tTS18046\t'questions' is of type 'unknown'.": 1,
-    "test/helpers/workflow-judge-cache.ts\tTS2352\tConversion of type 'string | number | boolean | EvalCacheValue[] | { [key: string]: EvalCacheValue; } | null' to type 'JudgeScore' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first. Type '{ [key: string]: EvalCacheValue; }' is missing the following properties from type 'JudgeScore': clarity, completeness, actionability, reasoning": 1,
     "test/impeccable-fixtures.test.ts\tTS2769\tNo overload matches this call. The last overload gave the following error. Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.": 1,
     "test/llm-judge-abort.test.ts\tTS2769\tNo overload matches this call. The last overload gave the following error. Argument of type '{ passed: boolean; }' is not assignable to parameter of type 'undefined'.": 3,
     "test/llm-judge-frontier.test.ts\tTS2769\tNo overload matches this call. The last overload gave the following error. Argument of type '{ score: number; reason: string; }' is not assignable to parameter of type 'undefined'.": 1,