fix: address OpenSSF Scorecard findings

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/claude.yml

@@ -1,5 +1,7 @@
 name: Claude Code
 
+permissions: {}
+
 on:
   pull_request:
     branches: [main]

.github/workflows/codeql.yml

@@ -0,0 +1,34 @@
+name: "CodeQL"
+
+permissions:
+  security-events: write
+  contents: read
+  actions: read
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "30 5 * * 1"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ["actions"]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@5c8a8a642e79153f5d047b10ec1cba1d1cc65699 # v3
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@5c8a8a642e79153f5d047b10ec1cba1d1cc65699 # v3

SECURITY.md

@@ -0,0 +1,26 @@
+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| latest  | :white_check_mark: |
+
+## Reporting a Vulnerability
+
+If you discover a security vulnerability in this project, please report it responsibly.
+
+**Please do NOT open a public GitHub issue for security vulnerabilities.**
+
+Instead, please send an email to **security@petry-projects.dev** with:
+
+1. A description of the vulnerability
+2. Steps to reproduce the issue
+3. Any potential impact
+4. Suggested fix (if available)
+
+We will acknowledge receipt within 72 hours and aim to provide a fix within 30 days of confirmation.
+
+## Security Updates
+
+Security updates will be released as patch versions and announced via GitHub releases.