- ma.lock.Release now unlinks the .lck sentinel after releasing
the OS lock (SysUtils.DeleteFile to avoid Windows API collision)
- Unit headers trimmed to standard dev-comment form (purpose only)
- docs/API.md: complete API reference with runnable examples,
event types, locking semantics, tosser wiring, native-backend
drop-down pattern, per-format cheat-sheet
- README links to the new doc
