Fix disti-mode paper pps relaying

Turns out we were putting too many brokername suffixes in the symbol
field and thus the order mode msg parser wasn't matching the current
asset to said msgs correctly and pps weren't being shown...

This repairs that plus simplifies the order mode initial pos msg loading
to just delegate into `process_trade_msg()` just as is done for
real-time msg updates.

piker/clearing/_paper_engine.py

@@ -23,7 +23,6 @@ from contextlib import asynccontextmanager
 from datetime import datetime
 from operator import itemgetter
 import itertools
-from pprint import pformat
 import time
 from typing import (
     Any,
@@ -204,7 +203,7 @@ class PaperBoi(Struct):
     async def fake_fill(
         self,
 
-        symbol: str,
+        fqsn: str,
         price: float,
         size: float,
         action: str,  # one of {'buy', 'sell'}
@@ -258,34 +257,34 @@ class PaperBoi(Struct):
             await self.ems_trades_stream.send(msg)
 
         # lookup any existing position
-        token = f'{symbol}.{self.broker}'
+        key = fqsn.rstrip(f'.{self.broker}')
         pp = self._positions.setdefault(
-            token,
+            fqsn,
             Position(
                 Symbol(
-                    key=symbol,
+                    key=key,
                     broker_info={self.broker: {}},
                 ),
                 size=size,
                 ppu=price,
-                bsuid=symbol,
+                bsuid=key,
             )
         )
         t = Transaction(
-            fqsn=symbol,
+            fqsn=fqsn,
             tid=oid,
             size=size,
             price=price,
             cost=0,  # TODO: cost model
             dt=pendulum.from_timestamp(fill_time_s),
-            bsuid=symbol,
+            bsuid=key,
         )
         pp.add_clear(t)
 
         pp_msg = BrokerdPosition(
             broker=self.broker,
             account='paper',
-            symbol=symbol,
+            symbol=fqsn,
             # TODO: we need to look up the asset currency from
             # broker info. i guess for crypto this can be
             # inferred from the pair?
@@ -416,7 +415,7 @@ async def simulate_fills(
 
                         # clearing price would have filled entirely
                         await client.fake_fill(
-                            symbol=sym,
+                            fqsn=sym,
                             # todo slippage to determine fill price
                             price=tick_price,
                             size=size,
@@ -443,7 +442,7 @@ async def handle_order_requests(
                 # error on bad inputs
                 reason = None
                 if account != 'paper':
-                    reason = f'Paper account only. No account found: `{account}` ?'
+                    reason = f'No account found:`{account}` (paper only)?'
 
                 elif order.size == 0:
                     reason = 'Invalid size: 0'
@@ -543,7 +542,6 @@ async def trades_dialogue(
 
         # TODO: load paper positions per broker from .toml config file
         # and pass as symbol to position data mapping: ``dict[str, dict]``
-        # await ctx.started(all_positions)
         await ctx.started((pp_msgs, ['paper']))
 
         async with (

piker/ui/order_mode.py

@@ -642,18 +642,7 @@ async def open_order_mode(
         # Pack position messages by account, should only be one-to-one.
         # NOTE: requires the backend exactly specifies
         # the expected symbol key in its positions msg.
-        pps_by_account = {}
-        for (broker, acctid), msgs in position_msgs.items():
-            for msg in msgs:
-
-                sym = msg['symbol']
-                if (
-                    (sym == symkey) or (
-                        # mega-UGH, i think we need to fix the FQSN
-                        # stuff sooner then later..
-                        sym == symkey.removesuffix(f'.{broker}'))
-                ):
-                    pps_by_account[acctid] = msg
+        # pps_by_account = {}
 
         # update pp trackers with data relayed from ``brokerd``.
         for account_name in accounts:
@@ -667,11 +656,6 @@ async def open_order_mode(
                 # XXX: BLEH, do we care about this on the client side?
                 bsuid=symbol,
             )
-            msg = pps_by_account.get(account_name)
-            if msg:
-                log.info(f'Loading pp for {symkey}:\n{pformat(msg)}')
-                startup_pp.update_from_msg(msg)
-
             # allocator config
             alloc = mk_allocator(
                 symbol=symbol,
@@ -789,6 +773,15 @@ async def open_order_mode(
         # Begin order-response streaming
         done()
 
+        for (broker, acctid), msgs in position_msgs.items():
+            for msg in msgs:
+                log.info(f'Loading pp for {symkey}:\n{pformat(msg)}')
+                await process_trade_msg(
+                    mode,
+                    book,
+                    msg,
+                )
+
         # start async input handling for chart's view
         async with (