Add YC-Bench benchmark result (avg $230,465)

Adding YC-Bench evaluation result for MiniMax-M2.5.

**Score: $230,465** (average final funds across seeds 1, 2, 3)

Benchmark: [collinear-ai/yc-bench](https://github.com/collinear-ai/yc-bench)
Preset: medium (1-year simulation)
Date: 2026-04-02

.eval_results/yc-bench.yaml

@@ -0,0 +1,12 @@
+# .eval_results/yc-bench.yaml — YC-Bench evaluation result
+# See: https://github.com/collinear-ai/yc-bench
+
+- dataset:
+    id: collinear-ai/yc-bench
+    task_id: medium
+  value: 230465
+  date: "2026-04-02"
+  source:
+    url: https://github.com/collinear-ai/yc-bench
+    name: "YC-Bench eval"
+  notes: "medium preset, avg final funds (USD) across seeds 1,2,3"