Bug fix in last checkpoint save.#460

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pan-x-c merged 4 commits intomodelscope:mainfrom

chenyushuo:fix/ckpt_save

Jan 4, 2026

Commits on Dec 30, 2025

Refactor checkpoint manager and add `latest_*_save_step` to avoid repeat save in same step
chenyushuo
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1. Enhance `TestTrainerCheckpointSave`
chenyushuo
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Commits on Dec 31, 2025

Merge branch 'main' of github.com:modelscope/Trinity-RFT into fix/ckpt_save
chenyushuo
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Commits on Jan 4, 2026

apply reviews from gemini
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