test: run seven paid evals on the current default capture model (B8)

skill-e2e-{auq-matrix,plan-format,qa-bugs,retro,workflow} pinned
claude-opus-4-7 and skill-e2e-office-hours plus -brain-writeback pinned
claude-sonnet-4-6; none tests a historical model, so they now capture with
resolveEvalModel('capture'), and the free harness tests that execute these
registrations receive the same resolver. The paid re-pin run passed all of
them. skill-e2e-{design,office-hours-phase4,plan-prosons,plan} keep
claude-opus-4-7: six of their cases failed on the default model (three
timeouts, a missing report file, a format miss and a posture score of 3), so
per the plan's fallback they keep their pins with a TODOS entry. The pre-spend
estimate and drop threshold are in docs/test-audit-2026-09.md.

test/skill-e2e-auq-matrix.test.ts

@@ -27,6 +27,7 @@
  * Run a subset in the foreground with AUQ_MATRIX_ONLY="plan-eng-review,spec".
  */
 import { test } from 'bun:test';
+import { resolveEvalModel } from '../lib/eval-model';
 import { CAPTURE_MS } from './helpers/eval-budgets';
 import { describeE2ETier } from './helpers/e2e-gate';
 import * as fs from 'node:fs';
@@ -96,7 +97,7 @@ const MATRIX: MatrixSkill[] = [
     // controlled Opus re-run passed cleanly (7/7 format, substance 5, 160s).
     // The spec workflow's long pre-question phase needs the stronger model
     // to reach its first AskUserQuestion inside the turn budget.
-    model: 'claude-opus-4-7',
+    model: resolveEvalModel('capture'),
   },
   {
     skill: 'design-consultation',