[Feat]: Implement partial rollout#1826

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stargazerZJ wants to merge 4 commits intoverl-project:mainfrom

stargazerZJ:pr-partial-rollout

Commits on Jun 2, 2025

feat: implement partial rollout
stargazerZJ
committed

Commits on Jun 18, 2025

Resolve merge conflicts with main
stargazerZJ
committed

Commits on Jun 23, 2025

fix: training sample divisor computation
stargazerZJ
committed

Commits on Jun 24, 2025

fix: key error when concating with an empty partial batch
stargazerZJ
committed