FTX: Funding rates, payments & stats + order manager tracking (#976)

* Adds basic PoC for calculating/retrieving position data

* A very unfortunate day of miscalculations

* Adds position summary and funding rate details to RPC

* Offline funding rate calculations

* More helpers, more stats, refining data, automated retrieval

* Adds new rpc server commands and attempts some organisation

* lower string, lower stress

* Adds ordermanager config. Fleshes outcli. Tracks positions automatically

* Adds new separation for funding payments/rates

* Combines funding rates and payments

* Fun test coverage

* ALL THE TESTS... I hope

* Fixes

* polishes ftx tests. improves perp check. Loops rates

* Final touches before nit attax

* buff 💪

* Stops NotYetImplemented spam with one simple trick!

* Some lovely little niteroos

* linteroo

* Clarifies a couple of errors to help narrow likely end user problems

* Fixes asset type bug, fixes closed position order return, fixes unset status bug

* Fixes order manager handling when no rates are available yet

* Continues on no funding rates instead. Removes err

* Don't show predicted rate if the time is zero

* Addresses scenario with no funding rate payments

* Bug fixes and commentary before updating maps to use *currency.Item

* Adds a pair key type

* Polishes pKey, fixes map order bug

* key is not a property in the event someone changes the base/quote

* Adds improvements to order processing...Breaks it all

* Shakes up the design of things by removing a function

* Fixes issues with order manager positions. Limits update range

* Fixes build issues. Identification of bad tests.

* Merges and fixes features from master and this branch

* buff linter 💪

* re-gen

* proto regen

* Addresses some nits. But not all of them.

* Fixes issue where funding rates weren't returned 🎉

* completes transition futures tracking to map[*currency.Item]map[*currency.Item]

* who did that? not me

* removes redundant check on account of being redundant and unnecessary

* so buf

* addresses nits: duplications, startTime, loops, go tidy, typos

* fixes minor mistakes

* fixes 🍣 🐻 changes to int64

engine/websocketroutine_manager_test.go

@@ -131,7 +131,7 @@ func TestWebsocketRoutineManagerHandleData(t *testing.T) {
 	exch.SetDefaults()
 	em.Add(exch)
 
-	om, err := SetupOrderManager(em, &CommunicationManager{}, &wg, false, false)
+	om, err := SetupOrderManager(em, &CommunicationManager{}, &wg, false, false, 0)
 	if !errors.Is(err, nil) {
 		t.Errorf("error '%v', expected '%v'", err, nil)
 	}