Cardano Updates

cardano ping implemented with ouroboros-network

KnownPeers.setCurrentTime and EstablishedPeers.setCurrentTime run on
every governor loop iteration. Add a fast path to KnownPeers for the
common case where nothing is scheduled or the earliest scheduled time
is still in the future; previously it always ran the general path,
rebuilding the record and (with +asserts) checking the invariant.

In EstablishedPeers use findMin instead of minView in the existing
fast-path guard: an O(1) peek that avoids allocating the deletion of
the minimum. The fast path now also covers the empty-queue case, which
previously fell through to the general path.

```
nix build .\#cardano-ping-static.x86_64-linux
```

* Log stat header.
* Formatting stat header & StatPoint.
* Start logging ping statistics / tip / query results only when all clients are ready.  This way we
  don't mix connection messages / warnings with other messages.

Bold headers are printed when color output is enabled (always, or auto
when stdout is a terminal).

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Bold headers are printed when color output is enabled (always, or auto
when stdout is a terminal).

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

```
nix build .\#cardano-ping-static.x86_64-linux
```

* Log stat header.
* Formatting stat header & StatPoint.
* Start logging ping statistics / tip / query results only when all clients are ready.  This way we
  don't mix connection messages / warnings with other messages.

Change the time for each call so that ghc is forced to run every loop
itteration.

* Log stat header.
* Formatting stat header & StatPoint.
* Start logging ping statistics only when all clients are ready.  This way we
  don't mix connection messages / warnings with ping statistics.

`concurrently` finishes as soon as one of the threads fails or all exit
cleanly, but we want all the threads to continue until all of them
terminate.

```
nix build .\#cardano-ping-static.x86_64-linux
```

```
nix build .\#cardano-ping-static.x86_64-linux
```

* Log stat header.
* Formatting stat header & StatPoint.
* Start logging ping statistics only when all clients are ready.  This way we
  don't mix connection messages / warnings with ping statistics.

`concurrently` finishes as soon as one of the threads fails or all exit
cleanly, but we want all the threads to continue until all of them
terminate.