fix: add CodeQL security scanning workflow

Adds CodeQL workflow for static analysis security scanning.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

Author: hyperpolymath

.github/workflows/codeql.yml

@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: MPL-2.0
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: '0 0 * * 0'
+
+permissions:
+  actions: read
+  contents: read
+  security-events: write
+
+jobs:
+  analyze:
+    name: CodeQL Analysis
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: actions
+            build-mode: none
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@29b1f65c1f735799893313399435a59f54045865 # v3
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.build-mode }}
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@29b1f65c1f735799893313399435a59f54045865 # v3
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@29b1f65c1f735799893313399435a59f54045865 # v3