work on market-data-gateway

docs/platform-services/service-discovery/README.md

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+# Service Discovery
+
+## Overview
+The Service Discovery component will provide dynamic registration, discovery, and health monitoring of services within the stock-bot platform. It will enable services to locate and communicate with each other without hardcoded endpoints, supporting a flexible and resilient microservices architecture.
+
+## Planned Features
+
+### Service Registration
+- **Automatic Registration**: Self-registration of services on startup
+- **Metadata Management**: Service capabilities and endpoint information
+- **Instance Tracking**: Multiple instances of the same service
+- **Version Information**: Service version and compatibility data
+- **Registration Expiry**: TTL-based registration with renewal
+
+### Service Discovery
+- **Name-based Lookup**: Find services by logical names
+- **Filtering**: Discovery based on metadata and attributes
+- **Load Balancing**: Client or server-side load balancing
+- **Caching**: Client-side caching of service information
+- **DNS Integration**: Optional DNS-based discovery
+
+### Health Monitoring
+- **Health Checks**: Customizable health check protocols
+- **Automatic Deregistration**: Removal of unhealthy instances
+- **Status Propagation**: Health status notifications
+- **Dependency Health**: Cascading health status for dependencies
+- **Self-healing**: Automatic recovery procedures
+
+### Configuration Management
+- **Dynamic Configuration**: Runtime configuration updates
+- **Environment-specific Settings**: Configuration by environment
+- **Configuration Versioning**: History and rollback capabilities
+- **Secret Management**: Secure handling of sensitive configuration
+- **Configuration Change Events**: Notifications of config changes
+
+## Planned Integration Points
+
+### Service Integration
+- All platform microservices
+- External service dependencies
+- Infrastructure components
+- Monitoring systems
+
+## Planned Technical Implementation
+
+### Technology Stack
+- **Service Registry**: Consul, etcd, or ZooKeeper
+- **Client Libraries**: TypeScript SDK for services
+- **Health Check**: HTTP, TCP, and custom health checks
+- **Configuration Store**: Distributed key-value store
+- **Load Balancer**: Client-side or service mesh integration
+
+### Architecture Pattern
+- Service registry pattern
+- Client-side discovery pattern
+- Health check pattern
+- Circuit breaker integration
+
+## Development Guidelines
+
+### Service Integration
+- Registration process
+- Discovery implementation
+- Health check implementation
+- Configuration consumption
+
+### Resilience Practices
+- Caching strategy
+- Fallback mechanisms
+- Retry configuration
+- Circuit breaker settings
+
+### Operational Considerations
+- High availability setup
+- Disaster recovery approach
+- Scaling guidelines
+- Monitoring requirements
+
+## Implementation Roadmap
+1. Core service registry implementation
+2. Basic health checking
+3. Service discovery integration
+4. Configuration management
+5. Advanced health monitoring with dependency tracking