feat: add explicit sequence-based reordering for DeltaResult items#3074
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feat: add explicit sequence-based reordering for DeltaResult items#3074
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Add a `sequence` field to `DeltaResult` with a `with_sequence()` builder and `sequence()` accessor so producers can stamp submission order before parallel dispatch. Introduce `ReorderBuffer<T>` in the `concurrent_delta::reorder` module - a BTreeMap-backed buffer that accepts out-of-order items by sequence number and yields them strictly in order via `next_in_order()` and `drain_ready()`. Configurable capacity bound prevents unbounded memory growth when a slow item blocks delivery. Wire the buffer into the pipeline architecture docs and add an integration test demonstrating the full work queue -> par_bridge -> strategy dispatch -> reorder buffer flow.
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Summary
sequencefield toDeltaResultwithwith_sequence()builder for stamping submission orderReorderBuffer<T>with BTreeMap-backed reordering and capacity boundsTest plan