Use new `Position.bsuid` field throughout

piker/clearing/_allocate.py

@@ -23,10 +23,9 @@ from typing import Optional
 
 from bidict import bidict
 from pydantic import BaseModel, validator
-from msgspec import Struct
+# from msgspec import Struct
 
 from ..data._source import Symbol
-from ._messages import BrokerdPosition, Status
 from ..pp import Position
 
 
@@ -202,7 +201,12 @@ class Allocator(BaseModel):
         if order_size < slot_size:
             # compute a fractional slots size to display
             slots_used = self.slots_used(
-                Position(symbol=sym, size=order_size, avg_price=price)
+                Position(
+                    symbol=sym,
+                    size=order_size,
+                    avg_price=price,
+                    bsuid=sym,
+                )
             )
 
         return {

piker/clearing/_paper_engine.py

@@ -264,6 +264,7 @@ class PaperBoi:
             Symbol(key=symbol),
             size=pp_msg.size,
             avg_price=pp_msg.avg_price,
+            uid=symbol.front_fqsn(),
         )
         pp_msg.size, pp_msg.avg_price = pp.lifo_update(size, price)
 

piker/ui/order_mode.py

@@ -33,10 +33,10 @@ import trio
 from PyQt5.QtCore import Qt
 
 from .. import config
+from ..pp import Position
 from ..clearing._client import open_ems, OrderBook
 from ..clearing._allocate import (
     mk_allocator,
-    Position,
 )
 from ._style import _font
 from ..data._source import Symbol
@@ -607,6 +607,9 @@ async def open_order_mode(
                 symbol=symbol,
                 size=0,
                 avg_price=0,
+
+                # XXX: BLEH, do we care about this on the client side?
+                bsuid=symbol,
             )
             msg = pps_by_account.get(account_name)
             if msg: