The 14-to-15 state migration was released in urbit-os-v2.142
so we add a new ames-state-16 to account for the removal of
.num-live from $pump-metrics.
This also adds several `$+` shorthand type name for better
prettyprinting in nest-fails situations, all related to the types in
$ames-state.
(note: ames states 14 and 15 are the same, ane tha migration
just re-retrieved our own %rift—first introduced in state-12-to-13)
The %kroc task was introduced in ames-state-10. The way the
migration works, is that queued-events are transformed right
away into the latests version, and the state is done step-wise in
different arms, but in one go as part of the +molt arm.
This means that all states from %10 need to handle cleaning up
the %kroc task, with the addition that we were already handling
another tasks, %snub, from ames-state-9 until ames-state-11.
This means that we need to handle both tasks in two different
ames-states, and from them only the %kroc task.
This also adds several $+ to the ames types, that make nest-failures
easier to read.
The fact that the target bone of a flow that we have received is a
naxplanation doesn't guarantee that there will be a naxplanation
flow (i.e. we have actually sent one) so instead of crashing, we just
continue processing the next bone.
The guest identities (#6561) and EAuth (#6598) features will both be
released as part of Zuse 412K, so their +load logic can be collapsed
into a single step.
Keeping a queue of nonces to match the outgoing %pleas we send lets us
recover the nonce for the %done we receive in response. This is
important in the nack case, where we may want to eagerly serve the HTTP
client an error page response, instead of waiting for the timeout timer
to fire.
We probably want something slightly fancier, like a banner or something,
that also shows up on the login page (and perhaps other "system" pages),
but for now this should suffice.
