Add scheduled job using docker image

.github/workflows/sigrid-scheduled.yml

@@ -0,0 +1,21 @@
+name: Sigrid CI scheduled
+on:
+    schedule:
+      - cron: '0 1 * * *'
+
+jobs:
+  sigridci:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Sigrid CI
+        uses: Software-Improvement-Group/sigridci@main
+        with:
+          customer: sig
+          system: sigridci-client
+          publishonly: true
+        env:
+          SIGRID_CI_TOKEN: "${{ secrets.SIGRID_CI_TOKEN }}"

sigrid.yaml

@@ -1,3 +1,4 @@
+default_excludes: false
 languages:
   - name: "Python"
 thirdpartyfindings: