Helm chart for Kubernetes deployment

[victorsoriadrp]

Context

Production users on Kubernetes need a maintained Helm chart instead of crafting their own manifests from the Docker Compose example. This is a v1.0 blocker for enterprise deployments.

Acceptance criteria

• Chart in deploy/helm/archipulse/
• Templates: Deployment, Service, Ingress, ConfigMap, Secret, PVC (if needed), HorizontalPodAutoscaler (optional)
• Values: image, replicas, resources, postgres (external/in-cluster), OIDC config, ingress class, persistence
• PostgreSQL: documented as either external (recommended) or via dependency on bitnami/postgresql
• CI: helm lint + helm template validation
• README in chart folder with installation example
• Published via helm repo or OCI registry