feature(jobs): add subscription endpoint

selfprivacy_api/graphql/subscriptions/jobs.py

@@ -0,0 +1,20 @@
+# pylint: disable=too-few-public-methods
+import strawberry
+
+from typing import AsyncGenerator, List
+
+from selfprivacy_api.jobs import job_notifications
+
+from selfprivacy_api.graphql.common_types.jobs import ApiJob
+from selfprivacy_api.graphql.queries.jobs import get_all_jobs
+
+
+@strawberry.type
+class JobSubscriptions:
+    """Subscriptions related to jobs"""
+
+    @strawberry.subscription
+    async def job_updates(self) -> AsyncGenerator[List[ApiJob], None]:
+        # Send the complete list of jobs every time anything gets updated
+        async for notification in job_notifications():
+            yield get_all_jobs()