vdjtools 5.0.2

Cohort processing now uses a fixed number of workers and one queued task per worker, with serial inner numerical kernels. Worker failures propagate without leaving the pool waiting. Known large numerical allocations check the available container memory before allocation.

Adds vdjtools features for unrotated statistical features and channels, and vdjtools pca to fit, save or apply a compatible sample-table rotation. Existing signature corpus behavior is preserved. AIRR identifiers retain leading zeros.

Validation: fast regression suite, focused worker/resource/PCA checks, warning-free docs and isolated wheel/native import checks. A generated 10,000-sample feature-table benchmark with four workers stayed below 0.5 GiB peak RSS under a 16 GiB limit.