ci: add Grype CVE scanning workflow, clean up vulnerable deps

.github/workflows/cve.yml

@@ -0,0 +1,55 @@
+name: CVE Scanning
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches: ['main']
+  pull_request:
+    branches: ['main']
+  schedule:
+    - cron: '0 6 * * 1' # Weekly Monday 6am UTC
+
+jobs:
+  grype:
+    name: Grype dependency scan
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
+      - name: Checkout
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+
+      - name: Install Grype
+        id: grype
+        uses: anchore/scan-action/download-grype@e1165082ffb1fe366ebaf02d8526e7c4989ea9d2 # v7
+        with:
+          cache-db: true
+
+      - name: Scan (table)
+        run: |
+          ${{ steps.grype.outputs.cmd }} dir:. \
+            --config .grype.yaml \
+            --only-fixed \
+            --fail-on high
+
+      - name: Scan (SARIF)
+        if: ${{ always() }}
+        run: |
+          ${{ steps.grype.outputs.cmd }} dir:. \
+            --config .grype.yaml \
+            --only-fixed \
+            --output sarif --file grype-results.sarif || true
+
+      - name: Upload SARIF report
+        if: ${{ always() }}
+        uses: github/codeql-action/upload-sarif@8aad20d150bbac5944a9f9d289da16a4b0d87c1e # v4
+        with:
+          sarif_file: grype-results.sarif

.grype.yaml

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+fail-on-severity: high
+sort-by: severity
+
+ignore:
+  - fix-state: 'wont-fix'
+  - fix-state: 'not-fixed'
+
+# Comment out to include scanning experimental license inventory
+exclude:
+  - './experimental/**'