Add devskim as per SDL requirement and cron jobs to all code scanning…

… workflows

.github/workflows/codeql.yml

@@ -12,7 +12,13 @@
 name: "CodeQL with manual C# build"
 
 on:
-  workflow_dispatch
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: '0 0 * * 0' # Sunday at 12am editby: ugreg
+  workflow_dispatch: # Enable workflow to be triggered manually
 
 jobs:
   analyze:

.github/workflows/devskim.yml

@@ -0,0 +1,37 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party (editby: ugreg - in this 
+# case the 3rd party is Microsoft CST-E 
+# https://github.com/microsoft/devskim) and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: DevSkim
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: '0 0 * * 0' # Sunday at 12am editby: ugreg
+  workflow_dispatch: # Enable workflow to be triggered manually
+
+jobs:
+  lint:
+    name: DevSkim
+    runs-on: ubuntu-20.04
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run DevSkim scanner
+        uses: microsoft/DevSkim-Action@v1
+
+      - name: Upload DevSkim scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: devskim-results.sarif