Add an authenticated scanner usage-state reset endpoint that publishes a fenced bootstrap marker for full rebuilds instead of requiring operators to delete usage metadata by hand.
Guard the reset with the scanner leader lock, storage publication epoch, and per-slot revision preconditions, and make startup resumable across stale cleanup leftovers while still rejecting newer conflicting usage state.
Co-authored-by: heihutu <heihutu@gmail.com>
Co-authored-by: Zhengchao An <anzhengchao@gmail.com>