v0.4.2

Highlights

The engine crate is now named seance. The binary, the GitHub
release asset, the wasm package, and the docker image are all
seance. The product on the website stays Necrometer — the
"seance" is the act of communing with your dead repos.

What's in this release

Renamed:

• Crate necrometer → seance (Cargo.toml [package].name,
  [lib].name, [[bin]].name).
• CLI binary necrometer → seance — ./seance card torvalds necrometer.svg.
• GitHub release asset necrometer-x86_64-unknown-linux-musl.tar.gz
  → seance-x86_64-unknown-linux-musl.tar.gz.
• wasm-pack package name necrometer → seance (.wasm-pack.toml).
• Wasm artifacts pkg/necrometer.js + pkg/necrometer_bg.wasm +
  pkg/necrometer.d.ts + pkg/necrometer_bg.wasm.d.ts →
  pkg/seance.js + pkg/seance_bg.wasm + pkg/seance.d.ts +
  pkg/seance_bg.wasm.d.ts.
• CLI usage strings: seance serve | seance card <name> [out.svg] | seance hall <names> [out.json].

Kept (intentional):

• The product name on necrometer.dev stays Necrometer.
• The GitHub org/repo names stay necrometer-dev/... — those are
  not renamed.
• The action (necrometer-dev/necrometer-action) keeps its name —
  consumers depend on uses: necrometer-dev/necrometer-action@v1.
• The card output file stays necrometer.svg — that's what
  README badges link to.

Required consumer changes:

• Workflows calling the action: no change — the action now points
  at v0.4.2 by default and downloads seance-*.tar.gz
  automatically.
• Sites embedding the wasm: update import paths
  import init from './pkg/seance.js',
  await init('./pkg/seance_bg.wasm').
• Anyone consuming the release artifact directly: switch to
  seance-x86_64-unknown-linux-musl.tar.gz.

Internal cleanups

• src/time.rs: SystemTime import is #[cfg(not(target_arch = "wasm32"))] — wasm builds cleanly without it.
• .wasm-pack.toml: new file documenting the wasm-pack package name
  (was previously implicit in wasm-pack build defaults).

Verification

cargo test --lib                            → 47 passed
cargo clippy ... -- -D warnings             → clean
cargo fmt --all -- --check                  → clean
cargo build --bin seance                    → ok
cargo build --bin seance --features serve   → ok
cargo build --lib --target wasm32-unknown-unknown → ok
wasm-pack build --release --target web ...  → ok
node smoke test                             → reading=354 svg=44590