SEL-179 & SEL-312: Add gitleaks and GitGuardian scanning (#705)

* chore: add secret scanning setup

* fix: correct GitGuardian action path

* cr feedbacak

* test husky commit

* pr feedback

* fix workflows

* tweaks

* fix versions

* upgrade: migrate from husky v8 to v9

- Update husky from ^8.0.0 to ^9.1.7
- Change prepare script from 'husky install' to 'husky'
- Remove v8 hook structure (shebang, husky.sh sourcing)
- Delete .husky/_/ directory as it's not needed in v9
- Maintain gitleaks pre-commit hook functionality

* coderabbitai feedback

.github/workflows/gitguardian.yml

@@ -0,0 +1,21 @@
+name: GitGuardian Scan
+
+on:
+  pull_request:
+
+jobs:
+  gitguardian:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # fetch all history so multiple commits can be scanned
+      - name: GitGuardian scan
+        uses: GitGuardian/ggshield/actions/secret@v1.41.0
+        env:
+          GITHUB_PUSH_BEFORE_SHA: ${{ github.event.before }}
+          GITHUB_PUSH_BASE_SHA: ${{ github.event.base }}
+          GITHUB_PULL_BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          GITHUB_DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
+          GITGUARDIAN_API_KEY: ${{ secrets.GITGUARDIAN_API_KEY }}

.github/workflows/gitleaks.yml

@@ -0,0 +1,20 @@
+name: Gitleaks Scan
+
+on:
+  pull_request:
+
+jobs:
+  gitleaks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install gitleaks
+        uses: gitleaks/gitleaks-action@v2.3.9
+        with:
+          config-path: .gitleaks.toml
+          fail: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE }}