test: derive paid touchfiles from each eval's static closure (E)

touchfiles.test.ts now checks, per key, that the paid file's static
test/helpers and test/fixtures closure (plus fixture paths it names in string
literals) is covered, and names the file, path, chain and key to fix when it is
not. Free *.test.ts files are no longer touchfiles, so editing a free replay
test stops selecting paid evals: 950 entries removed, 653 real closure paths
added. The hand-copied inventories go: periodic-fixture-selection,
fake-impeccable-touchfiles and 45 per-file selection examples. Selection for
the sample edits (plan-eng-review template, claude-pty-runner,
plan-count-fixture, gstack-config) loses no case under either profile.
CONTRIBUTING documents the rule and its lower bound.

test/ceo-mode-option.test.ts

@@ -1,7 +1,6 @@
 import { describe, expect, test } from 'bun:test';
 import { findCeoModeOption, hasPostAnswerCeoPosture, hasNativePostAnswerCeoPosture, nativeCeoModeAnswer, nextCeoModeNavigation, nextCeoPostureContinuation } from './helpers/ceo-mode-option';
 import { parseNumberedOptions, stripAnsi, planCountQuestionInput, nativePlanCallFingerprint } from './helpers/claude-pty-runner';
-import { E2E_TOUCHFILES, selectTests } from './helpers/touchfiles';
 import type { PlanCountTranscript } from './helpers/plan-count-transcript';
 import * as fs from 'node:fs';
 import * as os from 'node:os';
@@ -90,15 +89,6 @@ describe('CEO mode option matching', () => {
       { index: 2, label: 'Choose a plan │ SCOPE EXPANSION' },
     ], 'HOLD SCOPE')).toBeNull();
   });
-
-  test('the shared parser selects all callers while mode-specific regressions stay scoped', () => {
-    expect(selectTests(['test/helpers/ceo-mode-option.ts'], E2E_TOUCHFILES).selected)
-      .toEqual(['plan-ceo-mode-routing', 'plan-ceo-split-overflow']);
-    expect(selectTests(['test/ceo-mode-option.test.ts'], E2E_TOUCHFILES).selected)
-      .toEqual(['plan-ceo-mode-routing', 'plan-ceo-split-overflow']);
-    expect(selectTests(['test/pty-option-selection.test.ts'], E2E_TOUCHFILES).selected)
-      .toEqual(['plan-ceo-mode-routing']);
-  });
 });
 
 describe('CEO mode navigation replay', () => {