work on market-data-gateway

docs/integration-services/README.md

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+# Integration Services
+
+Integration services provide connectivity, messaging, and interoperability between internal services and external systems.
+
+## Services
+
+*Currently in planning phase - no active services deployed*
+
+## Planned Capabilities
+
+### Message Bus
+- **Purpose**: Event-driven communication between services
+- **Planned Functions**:
+  - Event publishing and subscription
+  - Message routing and transformation
+  - Dead letter queue handling
+  - Event sourcing and replay capabilities
+
+### API Gateway
+- **Purpose**: Unified API management and routing
+- **Planned Functions**:
+  - API endpoint consolidation
+  - Authentication and authorization
+  - Rate limiting and throttling
+  - Request/response transformation
+
+### External Data Connectors
+- **Purpose**: Third-party data source integration
+- **Planned Functions**:
+  - Alternative data provider connections
+  - News and sentiment data feeds
+  - Economic indicator integrations
+  - Social media sentiment tracking
+
+### Notification Service
+- **Purpose**: Multi-channel alerting and notifications
+- **Planned Functions**:
+  - Email, SMS, and push notifications
+  - Alert routing and escalation
+  - Notification templates and personalization
+  - Delivery tracking and analytics
+
+## Architecture
+
+Integration services will provide the connectivity fabric that enables seamless communication between all platform components and external systems, ensuring loose coupling and high scalability.

docs/integration-services/api-gateway/README.md

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+# API Gateway
+
+## Overview
+The API Gateway service will provide a unified entry point for all external API requests to the stock-bot platform. It will handle request routing, composition, protocol translation, authentication, and other cross-cutting concerns, providing a simplified interface for clients while abstracting the internal microservice architecture.
+
+## Planned Features
+
+### Request Management
+- **Routing**: Direct requests to appropriate backend services
+- **Aggregation**: Combine results from multiple microservices
+- **Transformation**: Convert between different data formats and protocols
+- **Parameter Validation**: Validate request parameters before forwarding
+- **Service Discovery**: Dynamically locate service instances
+
+### Security Features
+- **Authentication**: Centralized authentication for all API requests
+- **Authorization**: Role-based access control for API endpoints
+- **API Keys**: Management of client API keys and quotas
+- **JWT Validation**: Token-based authentication handling
+- **OAuth Integration**: Support for OAuth 2.0 flows
+
+### Traffic Management
+- **Rate Limiting**: Protect services from excessive requests
+- **Throttling**: Client-specific request throttling
+- **Circuit Breaking**: Prevent cascading failures
+- **Load Balancing**: Distribute requests among service instances
+- **Retries**: Automatic retry of failed requests
+
+### Operational Features
+- **Request Logging**: Comprehensive logging of API activity
+- **Metrics Collection**: Performance and usage metrics
+- **Caching**: Response caching for improved performance
+- **Documentation**: Auto-generated API documentation
+- **Versioning**: Support for multiple API versions
+
+## Planned Integration Points
+
+### Frontend Connections
+- Trading Dashboard (web client)
+- Mobile applications
+- Third-party integrations
+- Partner systems
+
+### Backend Services
+- All platform microservices
+- Authentication services
+- Monitoring and logging systems
+
+## Planned Technical Implementation
+
+### Technology Stack
+- **API Gateway**: Kong, AWS API Gateway, or custom solution
+- **Runtime**: Node.js with TypeScript
+- **Documentation**: OpenAPI/Swagger
+- **Cache**: Redis for response caching
+- **Storage**: Database for API configurations
+
+### Architecture Pattern
+- Backend for Frontend (BFF) pattern
+- API Gateway pattern
+- Circuit breaker pattern
+- Bulkhead pattern for isolation
+
+## Development Guidelines
+
+### API Design
+- RESTful API design standards
+- Error response format
+- Versioning strategy
+- Resource naming conventions
+
+### Security Implementation
+- Authentication requirements
+- Authorization approach
+- API key management
+- Rate limit configuration
+
+### Performance Optimization
+- Caching strategies
+- Request batching techniques
+- Response compression
+- Timeout configurations
+
+## Implementation Roadmap
+1. Core routing and basic security features
+2. Traffic management and monitoring
+3. Request aggregation and transformation
+4. Advanced security features
+5. Developer portal and documentation

docs/integration-services/message-bus/README.md

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+# Message Bus
+
+## Overview
+The Message Bus service will provide the central event-driven communication infrastructure for the stock-bot platform. It will enable reliable, scalable, and decoupled interaction between services through asynchronous messaging, event streaming, and publish-subscribe patterns.
+
+## Planned Features
+
+### Messaging Infrastructure
+- **Topic-based Messaging**: Publish-subscribe communication model
+- **Message Queuing**: Reliable message delivery with persistence
+- **Event Streaming**: Real-time event processing with replay capabilities
+- **Message Routing**: Dynamic routing based on content and metadata
+- **Quality of Service**: Various delivery guarantee levels (at-least-once, exactly-once)
+
+### Message Processing
+- **Message Transformation**: Content transformation and enrichment
+- **Message Filtering**: Rules-based filtering of messages
+- **Schema Validation**: Enforcement of message format standards
+- **Serialization Formats**: Support for JSON, Protocol Buffers, Avro
+- **Compression**: Message compression for efficiency
+
+### Operational Features
+- **Dead Letter Handling**: Management of unprocessable messages
+- **Message Tracing**: End-to-end tracing of message flow
+- **Event Sourcing**: Event storage and replay capability
+- **Rate Limiting**: Protection against message floods
+- **Back-pressure Handling**: Flow control mechanisms
+
+### Integration Capabilities
+- **Service Discovery**: Dynamic discovery of publishers/subscribers
+- **Protocol Bridging**: Support for multiple messaging protocols
+- **External System Integration**: Connectors for external message systems
+- **Legacy System Adapters**: Integration with non-event-driven systems
+- **Web Integration**: WebSocket and SSE support for web clients
+
+## Planned Integration Points
+
+### Service Connections
+- All platform microservices as publishers and subscribers
+- Trading Dashboard (for real-time updates)
+- External Data Sources (for ingestion)
+- Monitoring Systems (for operational events)
+
+## Planned Technical Implementation
+
+### Technology Stack
+- **Messaging Platform**: Kafka or RabbitMQ
+- **Client Libraries**: Native TypeScript SDK
+- **Monitoring**: Prometheus integration for metrics
+- **Management**: Admin interface for topic/queue management
+- **Storage**: Optimized storage for event persistence
+
+### Architecture Pattern
+- Event-driven architecture
+- Publish-subscribe pattern
+- Command pattern for request-response
+- Circuit breaker for resilience
+
+## Development Guidelines
+
+### Message Design
+- Event schema standards
+- Versioning approach
+- Backward compatibility requirements
+- Message size considerations
+
+### Integration Patterns
+- Event notification pattern
+- Event-carried state transfer
+- Command messaging pattern
+- Request-reply pattern implementations
+
+### Operational Considerations
+- Monitoring requirements
+- Scaling guidelines
+- Disaster recovery approach
+- Message retention policies
+
+## Implementation Roadmap
+1. Core messaging infrastructure
+2. Service integration patterns
+3. Operational tooling and monitoring
+4. Advanced features (replay, transformation)
+5. External system connectors and adapters