Advance development after v0.2.5 - #23

Summary

• record the verified v0.2.5 Trusted Publishing workflow, public artifact hashes, and independent PyPI install
• mark the v0.2.5 quality record released
• advance the package to 0.2.6.dev0 and regenerate PYPI.md with main links

Validation

• ruff check .
• ruff format --check .
• mypy src/miniverl
• python scripts/build_pypi_readme.py --check
• python scripts/check_markdown_links.py
• full non-GPU/non-network coverage suite: 1278 passed, 6 deselected, 87.37%
• build and Twine checks for 0.2.6.dev0
• frozen benchmark SHA-256 remains 53fc1d4d5b7adee09618d77ad62d4086ba56b78569832d6fc7c3bcd5c2695bbc

Public release evidence

• release workflow: https://github.com/DaoyuanLi2816/mini-verl/actions/runs/30611603505
• PyPI: https://pypi.org/project/miniverl/0.2.5/
• GitHub Release: https://github.com/DaoyuanLi2816/mini-verl/releases/tag/v0.2.5
• wheel SHA-256: 70c98284bce151fc74b508047b354929846efb71c3fe8f451c0d0ba1bec48e9d
• sdist SHA-256: d30bb07ebca676a3960d4b5c46075a8a2e13e58629b96984e30f8f7bab67dce0