Switch integration workflow to kind

Author: davidgamero

.github/actions/curl-port-forward/action.yml

@@ -0,0 +1,31 @@
+name: Curl port-forwarded service
+description: Port-forward a service and curl it with retries
+inputs:
+  service:
+    description: Kubernetes service name
+    required: true
+  port:
+    description: Service port to forward
+    required: true
+  local-port:
+    description: Local port for port-forward
+    required: false
+    default: "18080"
+runs:
+  using: composite
+  steps:
+    - name: curl service
+      shell: bash
+      run: |
+        kubectl get svc
+        echo 'Starting port-forward'
+        kubectl port-forward "svc/${{ inputs.service }}" "${{ inputs.local-port }}:${{ inputs.port }}" > /dev/null 2>&1 & pfPID=$!
+        trap 'kill $pfPID' EXIT
+        echo 'Curling service endpoint with retries'
+        for i in {1..20}; do
+          if curl -m 3 "http://127.0.0.1:${{ inputs.local-port }}"; then
+            exit 0
+          fi
+          sleep 3
+        done
+        exit 1

.github/actions/setup-kind-registry/action.yml

@@ -0,0 +1,32 @@
+name: Setup kind registry
+description: Create kind cluster with local registry and wait for it
+inputs:
+  registry-port:
+    description: Local registry port
+    required: false
+    default: "5000"
+outputs:
+  local-registry:
+    description: Local registry address from kind
+    value: ${{ steps.kind.outputs.LOCAL_REGISTRY }}
+runs:
+  using: composite
+  steps:
+    - name: start kind
+      id: kind
+      uses: helm/kind-action@v1.13.0
+      with:
+        registry: true
+        registry_name: kind-registry
+        registry_port: ${{ inputs.registry-port }}
+    - name: wait for registry
+      shell: bash
+      run: |
+        for i in {1..20}; do
+          if curl -sSf "http://${{ steps.kind.outputs.LOCAL_REGISTRY }}/v2/" > /dev/null; then
+            exit 0
+          fi
+          sleep 2
+        done
+        curl -sS "http://${{ steps.kind.outputs.LOCAL_REGISTRY }}/v2/" || true
+        exit 1

.github/workflows/integration-tests.yml

@@ -14,6 +14,7 @@ jobs:
         uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
         with:
           go-version: '1.25'
+          cache: true
       - name: make
         run: make
       - uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
@@ -35,6 +36,7 @@ jobs:
         uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
         with:
           go-version: '1.25'
+          cache: true
       - name: make
         run: make
       - uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0