test(benchmarks): add C#/ASP.NET and TypeScript tasks

Six tasks with hidden checks: ASP.NET validation and 404 handling, C#
cancellation, and TypeScript overlap, deep merge, and debounce fixes, checked
with dotnet run and node --test.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/benchmarks/tasks/17-ts-booking-overlap/hidden/check.test.ts

@@ -0,0 +1,14 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { overlaps } from '../src/booking.ts';
+
+test('back-to-back bookings do not overlap', () => {
+  assert.equal(overlaps({ start: 9, end: 10 }, { start: 10, end: 11 }), false);
+  assert.equal(overlaps({ start: 10, end: 11 }, { start: 9, end: 10 }), false);
+});
+
+test('real overlaps are detected', () => {
+  assert.equal(overlaps({ start: 9, end: 11 }, { start: 10, end: 12 }), true);
+  assert.equal(overlaps({ start: 9, end: 12 }, { start: 10, end: 11 }), true);
+  assert.equal(overlaps({ start: 9, end: 10 }, { start: 11, end: 12 }), false);
+});

scripts/benchmarks/tasks/17-ts-booking-overlap/repo/package.json

@@ -0,0 +1,5 @@
+{
+  "name": "booking",
+  "type": "module",
+  "private": true
+}

scripts/benchmarks/tasks/17-ts-booking-overlap/repo/src/booking.ts

@@ -0,0 +1,8 @@
+export interface Booking {
+  start: number;
+  end: number;
+}
+
+export function overlaps(a: Booking, b: Booking): boolean {
+  return a.start <= b.end && b.start <= a.end;
+}

scripts/benchmarks/tasks/17-ts-booking-overlap/task.json

@@ -0,0 +1,13 @@
+{
+  "prompt": "Back-to-back bookings, where one ends exactly when the next starts, are wrongly reported as overlapping. Fix overlaps() without breaking real overlaps.",
+  "check": [
+    "node",
+    "--experimental-strip-types",
+    "--no-warnings",
+    "--test",
+    "bench_hidden/check.test.ts"
+  ],
+  "workflow": {
+    "kind": "TypeScript change"
+  }
+}