debug: add DB config dump step to xdist workflow

Author: mchen-sentry

.github/workflows/backend-xdist.yml

@@ -318,6 +318,17 @@ jobs:
             done
           done
 
+      - name: Debug DB config
+        run: |
+          python3 -c "
+          import os, django
+          os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'sentry.conf.server')
+          from django.conf import settings
+          for alias, db in settings.DATABASES.items():
+              test_name = db.get('TEST', {}).get('NAME', '(not set)')
+              print(f'{alias}: NAME={db[\"NAME\"]}, TEST.NAME={test_name}')
+          "
+
       - name: Download selected tests artifact
         if: needs.prepare-selective-tests.outputs.has-selected-tests == 'true'
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0