- Replace WorkerPool-based pipelines with typed `Pipe` abstraction in obipipeline
- Introduce Pipe/PipeIter for composable, sourceless/sink-less pipelines
- Update partition and superkmer commands to use new Pipe API via make_pipe!
- Remove Arc<Mutex<...>> patterns; simplify state management
- Fix macOS available_memory() returning 0 by falling back to half total memory in dereplicate()
- Remove unused `format: "zstd"` field from partition.meta
- Replace crossbeam-channel-based threading model
- Introduce obipipeline crate with Stage::Transform/Flat support
- Replace single input + format detection by multiple inputs via PathIter
- Implement pipeline stages: open_chunks → normalize → build_superkmers (flat) + write_batch
- Add SharedFlatFn for 1→N transformations with delta tracking in scheduler loop
- Introduce `obipipline` crate with multi-threaded data pipeline architecture
- Implement core types: SourceFn, SharedFun (Arc), SinkFN with biased scheduler and crossbeam channels
- Add macros: `make_source!`, `transform!/fallible`/sink!, and high-level DSL macro
- Replace old wrapper/error modules with unified scheduler module (renamed types, improved error variants)
- Update workspace: add `obipipeline` member to Cargo.toml and lockfile
- Document pipeline in docmd/implementation with full architecture, error handling & example
- Refactor sandbox_pipeline.rs to use new DSL instead of manual channel wiring