TEMP: cancel-in-progress to clear a hung run; checkout step timeout

.gitea/workflows/audiobook.yml

@@ -22,7 +22,7 @@ permissions:
 
 concurrency:
   group: audiobook
-  cancel-in-progress: false           # one book at a time; a second drop waits
+  cancel-in-progress: true            # TEMPORARY: clearing a hung run (reverted right after)
 
 jobs:
   build:
@@ -39,6 +39,7 @@ jobs:
       PDF_INPUT: ${{ github.event_name == 'workflow_dispatch' && inputs.pdf || '' }}
     steps:
       - name: Check out the repository
+        timeout-minutes: 15           # a stalled fetch fails the run instead of hanging it for hours
         uses: actions/checkout@v4
         with:
           fetch-depth: 0