ci: Add pipeline for integration tests

Author: peanutfun

.github/workflows/ci.yml

@@ -9,6 +9,45 @@ defaults:
     shell: bash -el {0}
 
 jobs:
+  integration-test:
+    name: 'Core / Integration Test Pipeline'
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+
+    steps:
+      -
+        name: Checkout Repo
+        uses: actions/checkout@v4
+      -
+        # Store the current date to use it as cache key for the environment
+        name: Get current date
+        id: date
+        run: echo "date=$(date +%Y-%m-%d)" >> "${GITHUB_OUTPUT}"
+      -
+        name: Install make
+        uses: awalsh128/cache-apt-pkgs-action@v1
+        with:
+          packages: make
+      -
+        name: Install uv
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b  # v8.1.0
+        with:
+          python-version: "3.12"
+      -
+        name: Install dependencies
+        run: |
+          uv sync --locked --dev
+      -
+        name: Load data
+        run: |
+          uvx zenodo_get -v 3 10.5281/zenodo.20592941
+          unzip climada.zip
+      -
+        name: Run Integration Tests
+        run: |
+          uv run -- python -c "from climada.util.constants import SYSTEM_DIR; print(SYSTEM_DIR)"
+          make integ_test
+
   build-and-test:
     name: 'Core / Unit Test Pipeline'
     runs-on: ubuntu-latest