Introduces a counting semaphore-based throttling mechanism to limit concurrent file I/O and pipeline processing. Replaces custom path wrappers with standardized `Throttled` types across `obikmer` and `obikpartitionner`, ensuring RAII-based resource cleanup and explicit backpressure. Additionally, documents how to redirect Cargo build artifacts to local scratch storage on HPC filesystems to prevent compilation slowdowns.
Eric Coissac