Multi client order mgt

[goodboy]

This originally was a set of bug fixes but turned into somewhat of an enhancement where we can now support multi-client management of an emsd's orders.

---

Summary:

• every client that connects to the ems for a given fqsn becomes a subscriber and thus un-hindered manager of orders. this fixes bugs to do with reconnecting clients who weren't previously receiving order updates as well as lays ground work for true multi-user trading on a given ems cluster.
• variety of face-palm-y kraken broker backend fixes
• teensie bit of logging adding to the paper engine

---

TO TEST

start binance order mode with the paper engine and,

• [x] enter both live and dark orders and let some or none execute, disconnect the client, reconnect a new client, ensure that the old orders (both dark and live) show up and can be editted to get filled (without editing them to be clear-able immediately)
• [x] do the same but let some live orders clear without having any client connected (darks don't support this yet see below) and ensure on a chart-client reconnect the new pos is correct
• [x] for now you can probably verify that dark orders will not trigger when no client is connected
• [x] spawn more then one chart-client and be sure that changes from one are reflected in the other

---

TODO:

• [ ] make the dark clearing loop also run as part of the lifetime of the emsd actor, offer this as a config option (deferred to #405)

[guilledk]

Ok did the testing, test 1 and 2 work great.

3 as well dark dont get cleared but it seems to cancel the dark order it just deletes it.

4 opened a second chart and seems to have its own position tracking totally separate from the original chart.

[goodboy]

4 opened a second chart and seems to have its own position tracking totally separate from the original chart.

but does it see the original chart's orders?

[goodboy]

We need to pin to tractor master to make CI work again.

@guilledk cross-client-chart order mirroring is now workin 🏄🏼

[goodboy]

And yes this does resolve #402 🏄🏼