Merge origin/main (v1.91.7.0) into test-audit-reduction

Keep both intents: v1.91.7.0's functional QA, docsync and exploratory
paid cases and their free owners stay; this branch's deletions stay
deleted. main's new paid keys follow the derived-closure touchfile rule
(free *.test.ts paths dropped, static helper/fixture closure added), its
new helper-only tests join the ratchet baseline, and its free selection
examples that named free test files now assert the derived selection.

Periodic CI keeps seven slices without the retired Autoplan slice; the
gate census keeps seven single-worker slices with --skip-judges. Wall
and census literals are recomputed from the merged planner, durations
are re-recorded on Ubicloud, and VERSION stays 1.91.8.0 above 1.91.7.0.

test/eng-finding-retry-budget.test.ts

@@ -123,8 +123,11 @@ test('live periodic census fits the declared CI wall including setup', () => {
     const workers = files.some(isOverlayTestFile) ? Math.min(periodicWorkers, OVERLAY_MAX_ACTIVE_SHARDS) : periodicWorkers;
     return paidShardWallUpperBoundMs(files, workers);
   });
+  expect(Math.max(...walls)).toBe(14_680_000);
+  expect(periodicJob['timeout-minutes']).toBe(360);
+  expect(periodicJob.strategy['max-parallel']).toBe(8);
   expect(Math.max(...walls) + 20 * 60_000).toBeLessThanOrEqual(periodicJob['timeout-minutes'] * 60_000);
-  expect(m.entries.filter(e => e.status === 'planned')).toHaveLength(69);
+  expect(m.entries.filter(e => e.status === 'planned')).toHaveLength(70);
   const overlays = m.entries.filter(e => e.status === 'planned' && e.slice === periodicSliceCount);
   expect(overlays).toHaveLength(4);
   expect(overlays.every(e => isOverlayTestFile(e.file))).toBe(true);
@@ -132,7 +135,8 @@ test('live periodic census fits the declared CI wall including setup', () => {
 
 test('registered allocation is deterministic and preserves every discovered file', () => {
   const files = collectPaidTestFiles();
-  expect(files).toHaveLength(100);
+  expect(files).toHaveLength(104);
+  expect(files).toContain('test/skill-e2e-ship-skip.test.ts');
   const m = livePlan(files);
   expect(livePlan([...files].reverse())).toEqual(m);
   expect(m.entries.map(e => e.file).sort()).toEqual([...files].sort());
@@ -166,14 +170,18 @@ test('single-slice manifest retains all registered files with one allocation', (
 });
 
 test('current detach supervision covers the live-census floor', () => {
-  const files = selectPaidTestFiles(collectPaidTestFiles(), 'periodic').selected;
-  const excess = files.reduce((n, file) => n + Math.max(0, resolvePaidShardBudget([file]).timeoutMs - DEFAULT_SHARD_TIMEOUT_MS), 0);
-  const floor = Math.ceil((Math.ceil(files.length / DEFAULT_JOBS) * DEFAULT_SHARD_TIMEOUT_MS + excess) / 1000 * 1.05);
+  const floorFor = (tier: 'gate' | 'periodic') => {
+    const files = selectPaidTestFiles(collectPaidTestFiles(), tier).selected;
+    const excess = files.reduce((n, file) => n + Math.max(0, resolvePaidShardBudget([file]).timeoutMs - DEFAULT_SHARD_TIMEOUT_MS), 0);
+    return Math.ceil((Math.ceil(files.length / DEFAULT_JOBS) * DEFAULT_SHARD_TIMEOUT_MS + excess) / 1000 * 1.05);
+  };
   const pkg = JSON.parse(fs.readFileSync(path.join(import.meta.dir, '../package.json'), 'utf8'));
-  const configured = Number(pkg.scripts['eval:bg:periodic'].match(/--timeout\s+(\d+)/)[1]);
-  expect(floor).toBe(35910);
-  expect(configured).toBeGreaterThanOrEqual(floor);
-  expect(pkg.scripts['eval:bg:gate']).toContain('--timeout 36000');
+  const periodicTimeout = Number(pkg.scripts['eval:bg:periodic'].match(/--timeout\s+(\d+)/)[1]);
+  const gateTimeout = Number(pkg.scripts['eval:bg:gate'].match(/--timeout\s+(\d+)/)[1]);
+  expect(floorFor('gate')).toBe(42_851);
+  expect(gateTimeout).toBe(49_320);
+  expect(gateTimeout).toBeGreaterThanOrEqual(floorFor('gate'));
+  expect(floorFor('periodic')).toBe(37_727);
 });
 
 for (const jobs of [1, 2, 3]) test(`FIFO bound covers partial durations with ${jobs} workers`, () => {