Package-level declarations

The built-in reservation subscription of one bounded context: confirms the keys a committed entry reserved (held already or not), then releases the keys it released, as the kernel records them in the entry's transport (me.ahoo.wow.spi.log.Transport.reservations, me.ahoo.wow.spi.log.Transport.releases). The kernel's after-append actions are only the fast path; this subscription applies them when they never ran, because the process crashed between the append and them or they failed, so a committed fact neither loses its key to the pending reservation's expiry nor keeps a key it gave up.