feat: add secrets scanning to CI pipeline

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: baijum

.github/workflows/ci.yml

@@ -7,3 +7,6 @@ on:
 jobs:
   test:
     uses: towlion/.github/.github/workflows/test-python.yml@main
+
+  secrets-scan:
+    uses: towlion/.github/.github/workflows/secrets-scan.yml@main