feat: 新增 /run 接口，在 go-judge 沙箱中编译运行 C/C++

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

uv.lock

@@ -1,5 +1,5 @@
 version = 1
-revision = 3
+revision = 5
 requires-python = ">=3.12"
 
 [[package]]
@@ -73,6 +73,7 @@ source = { virtual = "." }
 dependencies = [
     { name = "aiosqlite" },
     { name = "fastapi" },
+    { name = "httpx" },
     { name = "openai" },
     { name = "pydantic" },
     { name = "python-dotenv" },
@@ -91,6 +92,7 @@ dev = [
 requires-dist = [
     { name = "aiosqlite", specifier = "==0.21" },
     { name = "fastapi", specifier = ">=0.119.1" },
+    { name = "httpx", specifier = ">=0.28.1" },
     { name = "openai", specifier = ">=2.6.0" },
     { name = "pydantic", specifier = ">=2.12.3" },
     { name = "python-dotenv", specifier = ">=1.1.1" },