always set SignalR events at the end of handlers (#445)

Addresses an issue where events meant for SignalR do not get sent to the service when an App Service instance spins down before a timer event fires.

src/api-service/__app__/tasks/__init__.py

@@ -3,7 +3,6 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
-# import logging
 import azure.functions as func
 from onefuzztypes.enums import ErrorCode, JobState
 from onefuzztypes.models import Error, TaskConfig
@@ -11,6 +10,7 @@ from onefuzztypes.requests import TaskGet, TaskSearch
 from onefuzztypes.responses import BoolResult
 
 from ..onefuzzlib.endpoint_authorization import call_if_user
+from ..onefuzzlib.events import get_events
 from ..onefuzzlib.jobs import Job
 from ..onefuzzlib.pools import NodeTasks
 from ..onefuzzlib.request import not_ok, ok, parse_request
@@ -99,7 +99,13 @@ def delete(req: func.HttpRequest) -> func.HttpResponse:
     return ok(task)
 
 
-def main(req: func.HttpRequest) -> func.HttpResponse:
+def main(req: func.HttpRequest, dashboard: func.Out[str]) -> func.HttpResponse:
     methods = {"GET": get, "POST": post, "DELETE": delete}
     method = methods[req.method]
-    return call_if_user(req, method)
+    result = call_if_user(req, method)
+
+    events = get_events()
+    if events:
+        dashboard.set(events)
+
+    return result

src/api-service/__app__/tasks/function.json

@@ -17,6 +17,12 @@
       "type": "http",
       "direction": "out",
       "name": "$return"
+    },
+    {
+      "type": "signalR",
+      "direction": "out",
+      "name": "dashboard",
+      "hubName": "dashboard"
     }
   ]
-}
+}