[model-gateway] include smg version command in py binding

[slin1237]

Tests

./target/release/amg --version
sgl-router version 0.0.0

Build Information:
Build Time: 2025-12-02 04:50:33 UTC
Build Mode: release
Platform: x86_64-unknown-linux-gnu

Version Control:
Git Branch: main
Git Commit: 11ce05163
Git Status: clean

Compiler:
rustc 1.89.0 (29483883e 2025-08-04)
cargo 1.89.0 (c24e10642 2025-06-23)

amg --version
sgl-router version 0.0.0

Build Information:
Build Time: 2025-12-02 05:11:21 UTC
Build Mode: release
Platform: x86_64-unknown-linux-gnu

Version Control:
Git Branch: main
Git Commit: 11ce05163
Git Status: dirty

Compiler:
rustc 1.89.0 (29483883e 2025-08-04)
cargo 1.89.0 (c24e10642 2025-06-23)

python3 -m sglang_router --version
sgl-router version 0.0.0

Build Information:
Build Time: 2025-12-02 05:11:21 UTC
Build Mode: release
Platform: x86_64-unknown-linux-gnu

Version Control:
Git Branch: main
Git Commit: 11ce05163
Git Status: dirty

Compiler:
rustc 1.89.0 (29483883e 2025-08-04)
cargo 1.89.0 (c24e10642 2025-06-23)

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.
• Follow the SGLang code style guidance.
• Work with maintainers to merge your PR. See the PR Merge Process

[gemini-code-assist]

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