feat: add airflow helm deployment workflow

.github/workflows/deploy.yml

@@ -0,0 +1,31 @@
+name: Deploy Airflow
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup kubeconfig
+        run: |
+          mkdir -p ~/.kube
+          echo "${{ secrets.KUBECONFIG_HETZNER }}" | base64 -d > ~/.kube/config
+
+      - name: Setup Helm
+        uses: azure/setup-helm@v4
+
+      - name: Deploy Airflow
+        run: |
+          helm repo add apache-airflow https://airflow.apache.org
+          helm repo update
+          helm upgrade --install airflow apache-airflow/airflow \
+            --namespace airflow \
+            --create-namespace \
+            --values helm/airflow/values.yaml \
+            --wait

helm/airflow/values.yaml

@@ -0,0 +1 @@
+executor: KubernetesExecutor