Devin AI 02c4b45c85 MR-925: validation-prototypes scaffolding + exp 1.1 + exp 1.2 ... - exclude validation-prototypes/ and merge-insert-cas-repro from the main workspace so the nested cargo workspace can use its own pin set - add validation-prototypes/{factorized-batches,custom-lance-index}/ scratch crates (never merged to main; long-lived branch only) - exp 1.1 — factorized batches through DataFusion ops: writeup at .context/experiments/factorized-batches.md (5 cells × 8 ops; all scalar-keyed ops accept List<UInt64> input, UNNEST via CROSS JOIN fails in DF 52.5) - exp 1.2 — custom Lance index plugin from outside lance: writeup at .context/experiments/custom-lance-index.md (5 probes; transaction surface is open, SCALAR_INDEX_PLUGIN_REGISTRY is closed → hard blocker for MR-737 §5.4; recommends upstream path or external-index path)		2026-05-12 16:49:33 +00:00
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custom-lance-index	MR-925: validation-prototypes scaffolding + exp 1.1 + exp 1.2	2026-05-12 16:49:33 +00:00
factorized-batches	MR-925: validation-prototypes scaffolding + exp 1.1 + exp 1.2	2026-05-12 16:49:33 +00:00
Cargo.lock	MR-925: validation-prototypes scaffolding + exp 1.1 + exp 1.2	2026-05-12 16:49:33 +00:00
Cargo.toml	MR-925: validation-prototypes scaffolding + exp 1.1 + exp 1.2	2026-05-12 16:49:33 +00:00