build: add audit workflow

.github/workflows/audit.yml

@@ -0,0 +1,39 @@
+name: Security Audit
+
+on:
+  schedule:
+    - cron: '0 3 * * 1' # Every Monday at 03:00 UTC
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  audit:
+    name: Cargo Audit and Deny
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        with:
+          toolchain: stable
+
+      - name: Cache Rust dependencies
+        uses: Swatinem/rust-cache@v2
+
+      - name: Install cargo-audit
+        run: cargo install cargo-audit
+
+      - name: Run cargo-audit
+        run: cargo audit
+
+      - name: Install cargo-deny
+        run: cargo install cargo-deny
+
+      - name: Run cargo-deny
+        run: cargo deny check
+
+