Capture `cons` in `Client.get_fute()`

That is to be able to (eventually) introspect "ambiguous" contract sets
once we move to `ib_async` and its `returnAll: bool` now offered by
`IB.qualifyContractsAsync()`,

https://github.com/ib-api-reloaded/ib_async/blob/main/ib_async/ib.py#L2115

Also, tweak some type type annots to multline style in sibling mods.

piker/brokers/ib/api.py

@@ -689,13 +689,14 @@ class Client:
                 ContFuture(symbol, exchange=exchange)
             ))[0]
         else:
-            con = (await self.ib.qualifyContractsAsync(
+            cons = (await self.ib.qualifyContractsAsync(
                 Future(
                     symbol,
                     exchange=exchange,
                     lastTradeDateOrContractMonth=expiry,
                 )
-            ))[0]
+            ))
+            con = cons[0]
 
         return con
 
@@ -895,7 +896,6 @@ class Client:
     async def get_sym_details(
         self,
         fqme: str,
-
     ) -> tuple[
         Contract,
         ContractDetails,
@@ -1534,6 +1534,7 @@ async def open_aio_client_method_relay(
 
 ) -> None:
 
+    # with tractor.devx.maybe_open_crash_handler() as _bxerr:
     # sync with `open_client_proxy()` caller
     chan.started_nowait(client)
 
@@ -1543,7 +1544,11 @@ async def open_aio_client_method_relay(
     # relay all method requests to ``asyncio``-side client and deliver
     # back results
     while not chan._to_trio._closed:  # <- TODO, better check like `._web_bs`?
-        msg: tuple[str, dict]|dict|None = await chan.get()
+        msg: (
+            None
+            |tuple[str, dict]
+            |dict
+        ) = await chan.get()
         match msg:
             case None:  # termination sentinel
                 log.info('asyncio `Client` method-proxy SHUTDOWN!')

piker/brokers/ib/symbols.py

@@ -522,7 +522,11 @@ async def get_mkt_info(
     if atype == 'commodity':
         venue: str = 'cmdty'
     else:
-        venue = con.primaryExchange or con.exchange
+        venue: str = (
+            con.primaryExchange
+            or
+            con.exchange
+        )
 
     price_tick: Decimal = Decimal(str(details.minTick))
     ib_min_tick_gt_2: Decimal = Decimal('0.01')