relay SignalR integrations through a storage queue (#1100)

The SignalR integration from Azure Functions does not have automatic retry.  When the SignalR instance has issues, all other APIs fail.

To make the service resilient to SignalR outages, this bounces SignalR events through an Azure Storage queue.

NOTE: This PR does not remove the integration from all of the functions.  That is intended to be done as a follow-on PR.

src/deployment/deploy.py

@@ -584,6 +584,7 @@ class Client:
             "proxy",
             "update-queue",
             "webhooks",
+            "signalr-events",
         ]:
             try:
                 client.create_queue(queue)