[CI] Improve Lark CI cards: structured layout, PDT timestamps, slow-only queue digest (#37884)

.github/workflows/ci-lark-notify.yml

@@ -9,7 +9,7 @@ on:
     branches: [main]
   schedule:
     - cron: '*/15 * * * *'   # runner-health
-    - cron: '30 */6 * * *'   # queue-digest
+    - cron: '30 */8 * * *'   # queue-digest
   workflow_dispatch:
     inputs:
       task:
@@ -105,7 +105,7 @@ jobs:
   queue-digest:
     if: >-
       github.repository == 'sgl-project/sglang' && (
-        (github.event_name == 'schedule' && github.event.schedule == '30 */6 * * *') ||
+        (github.event_name == 'schedule' && github.event.schedule == '30 */8 * * *') ||
         (github.event_name == 'workflow_dispatch' && inputs.task == 'queue-digest')
       )
     runs-on: ubuntu-latest
@@ -119,7 +119,8 @@ jobs:
           python-version: '3.12'
       - name: Post queue digest
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # PAT: an 8h window is ~400-500 API calls, too close to GITHUB_TOKEN's 1000/h
+          GITHUB_TOKEN: ${{ secrets.GH_PAT_FOR_NIGHTLY_CI_DATA }}
           LARK_WEBHOOK: ${{ secrets.LARK_WEBHOOK }}
         run: |
-          python scripts/ci_monitor/lark_notify.py $DRY_RUN_FLAG queue-digest --hours 6
+          python scripts/ci_monitor/lark_notify.py $DRY_RUN_FLAG queue-digest --hours 8 --only-if-slow