feat(table/write): merge partial-update rows at flush#380

TheR1sing3un wants to merge 3 commits into

apache:mainapache/paimon-rust:mainfrom

TheR1sing3un:feat/pu-writer-merge-on-flushTheR1sing3un/paimon-rust:feat/pu-writer-merge-on-flushCopy head branch name to clipboard