v2.4.7

Added

• New polypack-graph crate: a pure-Rust port of PolyGraph's public API
  on top of polypack-core, for applications that need the graph engine
  without a JS runtime. Covers node/edge CRUD with owned/shared
  cascade-delete semantics, the flush/warm/save/clear/dispose/prune
  persistence lifecycle, hot-cache eviction backed by an O(1) LRU list,
  the GraphQuery/PersistedGraphQuery fluent query builders (including
  joins, traversal, similarity ranking, and grouping/aggregation), and
  pluggable text embeddings (EmbeddingProvider, FeatureHashEmbedding,
  verified bit-for-bit identical to the TypeScript implementation) with
  add_node_with_embedding/query_text/search_nodes wired through.
  Published to crates.io alongside polypack-core.

Fixed

• Resolved cargo clippy --all-targets -D warnings failures in the new
  polypack-graph crate that were blocking CI: type-complexity on several
  dyn Fn closure fields (factored into type aliases), a needless
  .clone() on the Copy HnswConfig, two sort_by calls better
  expressed as sort_by_key, an if/else with identical bodies in
  remove_edges's edge-index cleanup, and a manual modulo check now
  expressed as u64::is_multiple_of. No behavior changes.