Add stream parameter to sender

src/AsapoWorker/asapo_sender.py

@@ -95,6 +95,7 @@ class AsapoSender:
                 "Allowed time in milliseconds for ASAP::O data access before "
                 "exception is thrown", type=float, default=3000)
         ))
+    stream = Config("Name of output stream", type=str, default="")
     substream = Config(
         "The name of the substream.", type=str, default="default", init=False)
     ingest_mode = Config(