perf: use built-in sorted() in DsList.sort_list

[m-truscott]

Summary

Replace the hand-rolled O(n²) bubble sort in DsList.sort_list with Python's built-in sorted(), improving performance and readability.

Changes

• Replace nested-loop bubble sort with sorted(v) in src/llm_benchmark/datastructures/dslist.py
• Remove 6 lines of manual swap logic

Validation

Validation commands configured for this project (run to verify the change is safe):

• Compilation: uv pip install poetry && python -m poetry install
• Unit tests: python -m poetry run pytest --benchmark-skip tests/
• Benchmark: python -m poetry run pytest --benchmark-only tests/

Notes

sorted() returns a new list, preserving the original non-mutating behaviour of the previous implementation. Both produce identical ascending-order output for List[int].

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changeset_id: ec82b078-0eba-4148-bb3b-c831e6a77c1d

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