feat(k8s): add defaults/main.yml, meta/main.yml for all 27 roles + 4 helm templates

- Added defaults/main.yml with production-ready values for all 27 Ansible roles
- Added meta/main.yml with role dependencies (DAG: prereq → namespaces → storage → traefik → cert-manager → services)
- Created 4 missing Helm templates: flink-deployment, kafka-cluster, smartapp-web, smartapp-api
- Fixed YAML syntax error in backup/tasks/main.yml (Velero backupStorageLocation)
- Updated README with domain list, dependencies diagram, and corrected Helm chart names
- All 81 YAML files pass validation

helms/roles/deltalake/defaults/main.yml

@@ -0,0 +1,17 @@
+---
+# Role: deltalake
+# Valeurs par défaut pour Delta Lake
+
+services:
+  deltalake:
+    replicas: 1
+    resources:
+      requests:
+        cpu: "250m"
+        memory: "512Mi"
+      limits:
+        cpu: "1000m"
+        memory: "2Gi"
+
+storage_sizes:
+  deltalake: "100Gi"

helms/roles/deltalake/meta/main.yml

@@ -0,0 +1,12 @@
+---
+galaxy_info:
+  author: Eric FELIXINE
+  description: Deploy Delta Lake storage layer for data lakehouse architecture on Kubernetes
+  license: MIT
+  min_ansible_version: "2.15"
+  platforms:
+    - name: Kubernetes
+      versions:
+        - "1.28"
+dependencies:
+  - role: databases