Create a Kubernetes Helm Chart with Best Practices and Customization

Generate a complete Kubernetes Helm chart for deploying [APPLICATION_NAME], a [APPLICATION_TYPE] (e.g., stateless web API, worker service, stateful database). The application runs on port [APP_PORT] and requires [RESOURCE_DEPENDENCIES] (e.g., PostgreSQL, Redis, S3). **Chart Structure — Generate all files:** 1. **Chart.yaml**: Set apiVersion v2, include dependencies for [SUBCHART_DEPENDENCIES] (e.g., bitnami/postgresql, bitnami/redis) with version pinning and condition toggles. 2. **values.yaml**: Provide a comprehensive, well-commented defaults file covering: - Image repository, tag (default `latest`), and pull policy - Replica count with HPA settings (min: [MIN_REPLICAS], max: [MAX_REPLICAS], CPU target: [CPU_TARGET]%) - Resource requests/limits (CPU: [CPU_REQUEST]/[CPU_LIMIT], Memory: [MEM_REQUEST]/[MEM_LIMIT]) - Environment variables from ConfigMap and Secrets with `existingSecret` support - Ingress configuration with TLS and [INGRESS_CLASS] annotation - Pod disruption budget, topology spread constraints, and affinity rules 3. **templates/deployment.yaml**: Include liveness/readiness/startup probes hitting [HEALTH_ENDPOINT], security context (non-root, read-only filesystem), graceful shutdown with preStop hook, and init containers for [INIT_TASK] (e.g., DB migration, config loading). 4. **templates/service.yaml**: ClusterIP service with named ports. 5. **templates/ingress.yaml**: Conditional ingress with path-based routing. 6. **templates/hpa.yaml**: HorizontalPodAutoscaler with CPU and custom metrics. 7. **templates/configmap.yaml** and **templates/secret.yaml**: Externalized configuration. 8. **templates/_helpers.tpl**: Standard helper templates for name, fullname, labels, and selector labels. 9. **templates/NOTES.txt**: Post-install instructions showing how to access the application. 10. **templates/tests/test-connection.yaml**: Helm test that verifies the service is reachable. Use `{{- include }}`, `{{- toYaml }}`, and proper indentation helpers throughout. Add comments explaining non-obvious template logic.