Changes in version 0.3.0 (2026-04-01)                  

  - Added execution plans with memory-budget-based block sizing and
    thread hints.
  - Added serializable prepared references with knn_load_prepared() and
    knn_validate_prepared().
  - Added exact radius-graph helpers, streamed directed kNN graph jobs,
    checkpointed radius streaming, and resumable checkpoints.
  - Added result coercion helpers plus exact recall summaries and
    candidate reranking utilities.

                        Changes in version 0.2.0                        

  - Added prepared exact references with knn_prepare_bigmatrix(),
    knn_search_prepared(), and knn_search_stream_prepared() for repeated
    search workloads.
  - Added exact radius-search APIs with in-memory and streamed outputs,
    including count_within_radius_bigmatrix(), radius_bigmatrix(), and
    radius_stream_bigmatrix().
  - Expanded metric support from Euclidean distance to "sqeuclidean" and
    "cosine".
  - Added exact graph builders for directed kNN, mutual kNN, and
    shared-nearest-neighbour graphs.

                        Changes in version 0.1.0                        

  - Initial release with exact Euclidean k-nearest-neighbour search on
    bigmemory::big.matrix references.
  - Added self-search and external-query search against big.matrix and
    dense matrix inputs.
  - Added both in-memory and streamed neighbour outputs through
    knn_bigmatrix() and knn_stream_bigmatrix().
  - Established package documentation, compiled backend registration,
    and the first regression tests.