chore: vendor sglang v0.5.10 snapshot

third_party/sglang/sgl-model-gateway/bindings/python/README.md

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+# SGLang Model Gateway Python Bindings
+
+This directory contains the Python bindings for the SGLang Router, built using [maturin](https://github.com/PyO3/maturin) and [PyO3](https://github.com/PyO3/pyo3).
+
+## Directory Structure
+
+```
+bindings/python/
+├── src/                    # Source code (src layout)
+│   ├── lib.rs              # Rust/PyO3 bindings implementation
+│   └── sglang_router/      # Python source code
+│       ├── __init__.py
+│       ├── version.py
+│       ├── launch_server.py
+│       ├── launch_router.py
+│       ├── router.py
+│       ├── router_args.py
+│       └── mini_lb.py
+├── tests/                  # Python unit tests
+│   ├── conftest.py
+│   ├── test_validation.py
+│   ├── test_arg_parser.py
+│   ├── test_router_config.py
+│   └── test_startup_sequence.py
+├── Cargo.toml              # Rust package configuration for bindings
+├── pyproject.toml          # Python package configuration
+├── setup.py                # Setup configuration
+├── MANIFEST.in             # Package manifest
+├── .coveragerc             # Test coverage configuration
+└── README.md               # This file
+```
+
+## Building
+
+### Development Build
+
+```bash
+# Install maturin
+pip install maturin
+
+# Build and install in development mode
+cd sgl-model-gateway/bindings/python
+maturin develop --features vendored-openssl
+```
+
+### Production Build
+
+```bash
+# Build wheel
+cd sgl-model-gateway/bindings/python
+maturin build --release --out dist --features vendored-openssl
+
+# Install the built wheel
+pip install dist/sglang_router-*.whl
+```
+
+## Testing
+
+```bash
+# Run Python unit tests (after maturin develop)
+cd sgl-model-gateway/bindings/python
+pytest tests/
+```
+
+## Configuration
+
+- **pyproject.toml**: Defines package metadata, dependencies, and build configuration
+- **python-source**: Set to `"src"` indicating Python source uses the src layout
+- **module-name**: `sglang_router.sglang_router_rs` - the Rust extension module name
+
+## Notes
+
+- The Rust bindings source code is located in `src/lib.rs`
+- The bindings have their own `Cargo.toml` in this directory
+- The main sglang-router library is located in `../../` and is used as a dependency
+- The package includes both Python code and Rust extensions built with PyO3
+- PyO3 types are prefixed with `Py` in Rust but exposed to Python without the prefix using the `name` attribute