Initial commit with project setup and basic structure established.

skills/g3fo-docs/references/architecture/domain_overview.md

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+# G3FO System Architecture Overview
+
+## 1. Domain Grouping
+The system is divided into the following functional domains:
+
+### Trading Domain
+- `g3fo-trade-service`: Core matching and order management.
+- `g3fo-exchange-fix-engine-service`: Exchange connectivity.
+- `g3fo-gateway-service`: API entry point for clients.
+- `g3fo-dx-service`: [Description]
+
+### Risk & Capital Domain
+- `g3fo-margin-service`: Margin calculations and liquidation.
+- `g3fo-base-service`: Basic master data.
+
+### User & Admin Domain
+- `g3fo-user-service`: User authentication and authorization.
+- `g3fo-admin-service`: Back-office management.
+- `g3fo-product-service`: Trading instrument configuration.
+
+### Utility & Infrastructure
+- `g3fo-utility-service`: Shared utilities.
+- `g3fo-push-service`: Real-time data broadcasting.
+- `g3fo-notification-service`: Email/SMS alerts.
+- `g3fo-monitor-service`: System health and metrics.
+
+## 2. Global Tech Stack
+- **Language**: Java / Spring Boot
+- **Database**: MySQL
+- **Cache**: Redis
+- **Communication**: [e.g., REST, gRPC, Kafka]