Link ARCHITECTURE.md in documentation

CONTRIBUTING.md

@@ -10,6 +10,7 @@ installer tooling.
 
 - **Backend (`cmd/`, `internal/`, `pkg/`)** – Go 1.23+ web server that embeds
   the built frontend and exposes REST + WebSocket APIs.
+- **Architecture (`ARCHITECTURE.md`)** – High-level system design diagrams and explanations.
 - **Frontend (`frontend-modern/`)** – Vite + React app built with TypeScript.
 - **Agents (`cmd/pulse-*-agent`)** – Go binaries distributed alongside Pulse for
   host and Docker telemetry.

README.md

@@ -58,6 +58,7 @@ Access the dashboard at `http://<your-ip>:7655`.
 - **[Configuration](docs/CONFIGURATION.md)**: Setup authentication, notifications, and advanced settings.
 - **[Security](SECURITY.md)**: Learn about Pulse's security model and best practices.
 - **[API Reference](docs/API.md)**: Integrate Pulse with your own tools.
+- **[Architecture](ARCHITECTURE.md)**: High-level system design and data flow.
 - **[Troubleshooting](docs/TROUBLESHOOTING.md)**: Solutions to common issues.
 
 ## ❤️ Support Pulse Development

docs/README.md

@@ -38,6 +38,7 @@ Welcome to the Pulse documentation portal. Here you'll find everything you need
 
 - **[API Reference](API.md)** – Complete REST API documentation.
 - **[Dev Quick Start](../DEV-QUICK-START.md)** – Hot-reload workflow for contributors.
+- **[Architecture](../ARCHITECTURE.md)** – System design and component interaction.
 - **[Contributing](../CONTRIBUTING.md)** – How to contribute to Pulse.
 - **[Mock Mode](development/MOCK_MODE.md)** – Developing without real infrastructure.