feat: 添加内测专用供应商 (internal-testing)

- 端点: https://api.yizhioa.cn/v1
- 协议: anthropic-messages
- 模型: GLM-5, Kimi-2.5, MiniMax-M2.5, Qwen3 Max, Qwen3.5 Plus, 豆包 Seed 2.0 Code Preview
- presetDataVersion: 10 → 11

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compute/providers/_index.json

@@ -24,6 +24,7 @@
     "kling",
     "stability",
     "openrouter",
-    "perplexity"
+    "perplexity",
+    "internal-testing"
   ]
 }