Drop `Symbol.front_fqsn()` usage from chart, fsp and clearing stuff

piker/clearing/_messages.py

@@ -300,10 +300,10 @@ class BrokerdError(Struct):
 
 
 class BrokerdPosition(Struct):
-    '''Position update event from brokerd.
+    '''
+    Position update event from brokerd.
 
     '''
-
     broker: str
     account: str
     symbol: str

piker/clearing/_paper_engine.py

@@ -544,7 +544,7 @@ async def trades_dialogue(
             pp_msgs.append(BrokerdPosition(
                 broker=broker,
                 account='paper',
-                symbol=pos.symbol.front_fqsn(),
+                symbol=pos.symbol.fqme,
                 size=pos.size,
                 avg_price=pos.ppu,
             ))

piker/fsp/_engine.py

@@ -104,7 +104,7 @@ async def fsp_compute(
         disabled=True
     )
 
-    fqsn = symbol.front_fqsn()
+    fqsn = symbol.fqme
     out_stream = func(
 
         # TODO: do we even need this if we do the feed api right?

piker/ui/_chart.py

@@ -290,7 +290,7 @@ class GodWidget(QWidget):
         symbol = self.rt_linked.symbol
         if symbol is not None:
             self.window.setWindowTitle(
-                f'{symbol.front_fqsn()} '
+                f'{symbol.fqme} '
                 f'tick:{symbol.tick_size}'
             )