Set arq timeouts for check runs

We want these check runs to be slightly longer than the configuration so
that the worker's code has a change to report the timeout before arq
kills the job itself and we lose the opportunity to report the check run
as failed to GitHub.

It seems that there are typing issues with using arq.worker.func, so
we'll try to ignore those for now.

src/timessquare/worker/main.py

@@ -6,6 +6,7 @@
 from collections.abc import Callable
 from typing import Any, ClassVar
 
+import arq
 import httpx
 import structlog
 from safir.dependencies.db_session import db_session_dependency
@@ -125,8 +126,15 @@ class WorkerSettings:
         repo_removed,
         pull_request_sync,
         compute_check_run,
-        create_check_run,
-        create_rerequested_check_run,
+        # Make the check run timeouts slightly longer than the configured
+        # timeout so we can handle the timeout gracefully inside the worker
+        arq.worker.func(  # type: ignore [list-item]
+            create_check_run, timeout=config.github_checkrun_timeout + 30.0
+        ),
+        arq.worker.func(  # type: ignore [list-item]
+            create_rerequested_check_run,
+            timeout=config.github_checkrun_timeout + 30.0,
+        ),
         replace_nbhtml,
     ]