ci: fetch full git history in checkout step for reliable rebase

Author: shimomo

.github/workflows/cron.yml

@@ -21,6 +21,8 @@ jobs:
 
       - name: Checkout Code
         uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
+        with:
+          fetch-depth: 0
 
       - name: Install base dependencies (without scraper)
         run: |