Add automated Python dependency security audit

.github/workflows/pip-audit.yml

@@ -0,0 +1,37 @@
+name: Python dependency security audit
+
+on:
+  schedule:
+    # Run every Monday at 06:00 UTC
+    - cron: "0 6 * * 1"
+
+  pull_request:
+
+  # Allow this workflow to be run manually.
+  workflow_dispatch:
+
+jobs:
+  pip-audit:
+    name: Audit Python dependencies
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Upgrade pip
+        run: python -m pip install --upgrade pip
+
+      - name: Install SolarFarmer Python SDK
+        run: python -m pip install .
+
+      - name: Check installed dependencies
+        run: python -m pip check
+
+      - name: Run pip-audit
+        uses: pypa/gh-action-pip-audit@v1.1.0