wal Directory Reference

Files
	wal.cpp
	Write-ahead journal record framing + crash-recovery replay (see wal.h).
	wal.h
	Write-ahead journal for atomic buffer-to-flash storage (DETWS_ENABLE_WAL).
	wal_fs.h
	Bind the WAL store's ::WalDev block-device seam to a real fs::FS file (DETWS_ENABLE_WAL, ESP32 only).
	wal_store.cpp
	A/B superblock + checkpoint + mount/recover over a block-device seam (see wal_store.h).
	wal_store.h
	Durable write-ahead store: A/B superblock + checkpoint over a block-device seam (DETWS_ENABLE_WAL).