Bump pipeline workflow timeout from 10m to 6h

modal run --detach keeps the CLI connected and streaming logs; it only
detaches the *app* if the CLI dies. GitHub Actions cancels the Modal
app when the runner timeout fires, killing the pipeline mid-run.
360 minutes (GitHub max) gives the full pipeline room to complete.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: baogorek

.github/workflows/pipeline.yaml

@@ -29,7 +29,7 @@ on:
 jobs:
   pipeline:
     runs-on: ubuntu-latest
-    timeout-minutes: 10
+    timeout-minutes: 360
     steps:
       - uses: actions/checkout@v4