Add stress step to CI

.github/workflows/stress.yml

@@ -0,0 +1,67 @@
+name: Stress test the package
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    paths:
+      - 'bin/**'
+      - 'fitsio/**'
+      - 'fitsio-derive/**'
+      - 'fitsio-sys/**'
+      - 'testdata/**'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'Cross.toml'
+      - 'rust-toolchain.toml'
+      - '.github/workflows/*.yml'
+
+# Only one pull-request triggered run should be executed at a time
+# (head_ref is only set for PR events, otherwise fallback to run_id which differs for every run).
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  stress:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-latest
+          - macos-13
+
+      steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
+      - name: Install ubuntu dependencies
+        run: |
+          sudo apt-get update && sudo apt-get install --no-install-recommends -y \
+            llvm-dev \
+            libcfitsio-dev \
+            pkg-config \
+            libssl-dev \
+            python3
+
+      - name: Install toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: beta
+
+      - uses: Swatinem/rust-cache@v2
+
+      - name: cargo generate-lockfile
+        # enable this ci template to run regardless of whether the lockfile is checked in or not
+        if: hashFiles('Cargo.lock') == ''
+        run: cargo generate-lockfile
+
+      - name: Install cargo-stress
+        run: cargo install cargo-stress
+
+      - name: Stress test the code
+        working-directory: fitsio
+        run: cargo stress
+