ci: add formatting and Helm lint checks

.github/workflows/lint.yml

@@ -12,15 +12,16 @@ permissions:
   pull-requests: read
 
 jobs:
-  golangci:
-    name: golangci-lint
-    runs-on: ubuntu-24.04
+  changes:
+    name: detect changes
+    runs-on: ubuntu-latest
+    outputs:
+      lint: ${{ steps.filter.outputs.lint }}
+      gofmt: ${{ steps.filter.outputs.gofmt }}
+      helm: ${{ steps.filter.outputs.helm }}
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
       - name: Filter paths
-        id: changes
+        id: filter
         uses: dorny/paths-filter@v3
         with:
           filters: |
@@ -30,13 +31,62 @@ jobs:
               - 'go.sum'
               - '.golangci.yml'
               - '.github/workflows/lint.yml'
+            gofmt:
+              - '**/*.go'
+              - 'Makefile'
+              - '.github/workflows/lint.yml'
+            helm:
+              - 'manifests/charts/base/**'
+              - 'Makefile'
+              - '.github/workflows/lint.yml'
+
+  golangci:
+    name: golangci-lint
+    needs: changes
+    if: needs.changes.outputs.lint == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
 
       - name: Set up Go
-        if: steps.changes.outputs.lint == 'true'
         uses: actions/setup-go@v5
         with:
           go-version: "1.24"
 
       - name: Run golangci-lint
-        if: steps.changes.outputs.lint == 'true'
         run: make lint
+
+  gofmt:
+    name: gofmt
+    needs: changes
+    if: needs.changes.outputs.gofmt == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "1.24"
+
+      - name: Check Go formatting
+        run: make fmt-check
+
+  helm:
+    name: helm-lint
+    needs: changes
+    if: needs.changes.outputs.helm == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v4
+        with:
+          version: v3.17.3
+
+      - name: Check Helm chart
+        run: make helm-check

Makefile

@@ -297,6 +297,11 @@ helm-template: ## Render Helm chart locally
 helm-lint: ## Lint Helm chart
 	helm lint manifests/charts/base
 
+.PHONY: helm-check
+helm-check: ## Lint Helm chart and verify templates render
+	$(MAKE) helm-lint
+	$(MAKE) helm-template >/dev/null
+
 
 ##@ Dependencies