//! `Wal` — the durable log handle.
//!
//! Layout:
//! - `wal` — the [`Wal`] struct, its open/append/flush/truncate methods,
//! the inner state machine, and `Drop`.
//! - `group_flusher` — background OS thread that periodically `fsync`s the
//! WAL when `SyncMode::GroupSync` is configured. Compiled out on `wasm32`,
//! where threads and `fsync` are unavailable; GroupSync falls back to
//! the cooperative drop-time flush there.
//! - `tests` — directory-level WAL tests.
pub use Wal;