v0.0.4

• added canonical CI workflow .github/workflows/ci.yml with locked stable, feature, MSRV, Clippy, rustdoc, formatting, repository checker, example, and publish validation;
• added complete Cargo metadata, docs.rs configuration, and Rust 1.74 MSRV declaration;
• added pinned nightly formatter scripts/fmt and DOC_76, RUST_TEST_NAMING, and DERIVE_LAYOUT checkers;
• clarified benchmark methodology and corrected README and example catalogue documentation;
• aligned development dependency versions and retained a Rust 1.74-compatible Cargo.lock;
• applied warning-free lint cleanup without changing public API or histogram behaviour;