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/pending-question-completion.test.ts

@@ -6,7 +6,6 @@ import { spawnSync } from 'node:child_process';
 import { createPendingQuestionRecorder, recordPendingQuestion, readPendingQuestion,
   pendingQuestionRecorderStatus } from './helpers/plan-count-pending-question';
 import { readPlanCountTranscript } from './helpers/plan-count-transcript';
-import { E2E_TOUCHFILES, selectTests } from './helpers/touchfiles';
 import captured from './fixtures/pending-question-completion-ad.json';
 
 // Public question/result contents are retained; hook envelopes, paths and live
@@ -186,10 +185,4 @@ describe('scoped pending question completion payloads', () => {
       expect(f.status()).toEqual({status:'idle'});expect(f.read()).toBeUndefined();
     } finally {f.dispose();}
   });
-
-  test('the completion regression and fixture select exactly the two opted-in paid workflows', () => {
-    for(const file of ['test/pending-question-completion.test.ts','test/fixtures/pending-question-completion-ad.json']) {
-      expect(selectTests([file],E2E_TOUCHFILES,[]).selected.sort()).toEqual(['plan-ceo-mode-routing']);
-    }
-  });
 });