Add cloudhost-platform Helm chart and registry ingress manifests.

Deploy backend, frontend, PostgreSQL, and Redis on Kubernetes with optional Ingress/TLS, SQL migration hooks, and public registry exposure at repo.3fase.ir.

Co-authored-by: Cursor <cursoragent@cursor.com>

ARCHITECTURE.md

@@ -177,6 +177,20 @@ ACTIVE ──(expires)──► SUSPENDED ──(grace)──► PENDING_DELETIO
 
 ---
 
+## Helm Chart: cloudhost-platform
+
+Chart at `backend/helm/cloudhost-platform/` deploys the **control plane** (NestJS API, Next.js UI, PostgreSQL, Redis) into a dedicated namespace (default `cloudhost`).
+
+| Value | Purpose |
+|-------|---------|
+| `ingress.enabled` | Create Ingress (default `true`) |
+| `ingress.tls.enabled` | cert-manager TLS via `clusterIssuer` |
+| `ingress.frontend.host` / `ingress.api.host` | Public hostnames |
+| `postgres.password` / `secrets.jwtSecret` | Credentials (auto-generated if empty on first install) |
+| `migrations.enabled` | Post-install SQL migration Job |
+
+---
+
 ## 🚀 Helm Chart: cloudhost-app
 
 Single chart at `backend/helm/cloudhost-app/` handles all runtimes:
@@ -208,6 +222,7 @@ host/
 ├── backend/
 │   ├── Dockerfile
 │   ├── package.json
+│   ├── helm/cloudhost-platform/  # Helm chart for control plane
 │   ├── helm/cloudhost-app/       # Helm chart for user apps
 │   ├── src/
 │   │   ├── main.ts / app.module.ts