chore: Add Trivy and Bandit scan workflow

.github/workflows/security-scan.yaml

@@ -0,0 +1,82 @@
+name: Security Scan
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  trivy-scan:
+    name: Trivy
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      actions: read
+      contents: read
+      checks: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run Trivy vulnerability scan
+        uses: aquasecurity/trivy-action@77137e9dc3ab1b329b7c8a38c2eb7475850a14e8
+        with:
+          scan-type: fs
+          scan-ref: .
+          format: sarif
+          output: trivy-results.sarif
+          severity: CRITICAL,HIGH,MEDIUM,LOW
+          exit-code: 0
+
+      - name: Check for critical and high vulnerabilities
+        uses: aquasecurity/trivy-action@77137e9dc3ab1b329b7c8a38c2eb7475850a14e8
+        with:
+          scan-type: fs
+          scan-ref: .
+          format: table
+          severity: CRITICAL,HIGH
+          exit-code: 1
+
+      - name: Upload SARIF to Security tab
+        if: always()
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: trivy-results.sarif
+          category: trivy-security-scan
+
+  bandit:
+    name: Bandit
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      actions: read
+      contents: read
+      checks: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run Bandit code scan
+        uses: PyCQA/bandit-action@67a458d90fa11fb1463e91e7f4c8f068b5863c7f
+        with:
+          project_path: .
+          bandit_args: "-r . -f sarif -o results.sarif"
+        continue-on-error: true
+
+      - name: Upload SARIF results to GitHub Security tab
+        if: github.ref == 'refs/heads/main'
+        uses: github/codeql-action/upload-sarif@86b04fb0e47484f7282357688f21d5d0e32175fe
+        with:
+          sarif_file: results.sarif
+          category: bandit-security-scan
+        continue-on-error: true
+
+      - name: Upload SARIF as artifact
+        if: always()
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: results.sarif
+          category: bandit-security-scan