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Add the scaffolding for the in-memory staged-write rewire — no behavior change yet: * New crates/omnigraph/src/exec/staging.rs with MutationStaging, PendingTable, PendingMode, StagedTablePath, plus the end-of-query finalize() that issues one stage_* + commit_staged per pending table (Merge mode dedupes by id, last-write-wins). * TableStore::scan_with_pending and count_rows_with_pending helpers — Lance scan committed + DataFusion MemTable scan pending, concat. Sidesteps the Scanner::with_fragments filter-pushdown limitation documented on scan_with_staged. * Add datafusion = "52" to workspace + omnigraph-engine deps for MemTable (transitively pulled by Lance already). Engine code still uses the legacy MutationStaging shape; the rewire lands in subsequent commits. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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