ci: Add automated security scanning workflow

Implements:
- Secret scanning with TruffleHog (catches leaked credentials)
- Dependency review on pull requests (blocks vulnerable dependencies)
- CodeQL analysis (finds security vulnerabilities in code)

Runs on:
- Every push to main/develop
- Every pull request
- Daily at 2 AM UTC

Author: firascoding

.github/workflows/security-scanning.yml

@@ -0,0 +1,73 @@
+name: Security Scanning
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+  schedule:
+    # Run daily at 2 AM UTC
+    - cron: '0 2 * * *'
+
+permissions:
+  contents: read
+  security-events: write
+  pull-requests: write
+
+jobs:
+  # Secret scanning using TruffleHog
+  secret-scanning:
+    name: Secret Scanning
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      
+      - name: TruffleHog OSS
+        uses: trufflesecurity/trufflehog@main
+        with:
+          path: ./
+          base: ${{ github.event.repository.default_branch }}
+          head: HEAD
+          extra_args: --debug --only-verified
+
+  # Dependency review on pull requests
+  dependency-review:
+    name: Dependency Review
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      
+      - name: Dependency Review
+        uses: actions/dependency-review-action@v4
+        with:
+          fail-on-severity: moderate
+
+  # CodeQL security analysis
+  codeql-analysis:
+    name: CodeQL Analysis
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'javascript', 'python' ]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+      
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
+      
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{matrix.language}}"