chore: vendor sglang v0.5.10 snapshot

third_party/sglang/sgl-model-gateway/src/routers/openai/mod.rs

@@ -0,0 +1,15 @@
+//! OpenAI-compatible router implementation
+//!
+//! This module provides OpenAI-compatible API routing with support for:
+//! - Streaming and non-streaming responses
+//! - MCP (Model Context Protocol) tool calling
+//! - Response storage and conversation management
+//! - Multi-turn tool execution loops
+//! - SSE (Server-Sent Events) streaming
+
+mod context;
+mod provider;
+pub mod responses;
+mod router;
+
+pub use router::OpenAIRouter;