Support `Forex` in the pp packer

piker/brokers/ib/broker.py

@@ -36,6 +36,7 @@ import tractor
 from ib_insync.contract import (
     Contract,
     Option,
+    Forex,
 )
 from ib_insync.order import (
     Trade,
@@ -88,9 +89,18 @@ def pack_position(
         # TODO: lookup fqsn even for derivs.
         symbol = con.symbol.lower()
 
+    # TODO: probably write a mofo exchange mapper routine since ib
+    # can't get it's shit together like, ever.
+
     # try our best to figure out the exchange / venue
     exch = (con.primaryExchange or con.exchange).lower()
     if not exch:
+
+        if isinstance(con, Forex):
+            # bc apparently it's not in the contract obj?
+            exch = 'idealfx'
+
+        else:
             # for wtv cucked reason some futes don't show their
             # exchange (like CL.NYMEX) ...
             entry = _adhoc_symbol_map.get(