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/plan-floor-dx-actor.test.ts

@@ -2,16 +2,9 @@ import {expect,test} from 'bun:test';
 import {planFloorDXPane,planFloorDXReplyInput,matchesNativePlanQuestion,type PlanFloorDXReply} from './helpers/claude-pty-runner';
 import captured from './fixtures/plan-floor-dx-custom-491.json';
 import editorHints from './fixtures/plan-floor-dx-editor-hint.json';
-import {E2E_TOUCHFILES,selectTests} from './helpers/touchfiles';
 const call=captured.call;
 const state=(stage:PlanFloorDXReply['stage']='focus'):PlanFloorDXReply=>({call:structuredClone(call),
   pane:planFloorDXPane(captured.questionViewport,call)!,reply:captured.reply,stage});
-
-test('editor-hint capture changes select the live DX finding-floor probe',()=>{
- expect(selectTests(['test/fixtures/plan-floor-dx-editor-hint.json'],E2E_TOUCHFILES,[]).selected)
-   .toContain('plan-devex-finding-floor');
-});
-
 test('generic matcher authenticates the crop while DX custom replies still require the complete pane',()=>{
   expect(matchesNativePlanQuestion(captured.originalViewport,call)).toBe(true);
   expect(planFloorDXPane(captured.originalViewport,call)).toBeNull();