feat: Implement hardware, pose, and stream services for WiFi-DensePose API

- Added HardwareService for managing router interfaces, data collection, and monitoring.
- Introduced PoseService for processing CSI data and estimating poses using neural networks.
- Created StreamService for real-time data streaming via WebSocket connections.
- Implemented initialization, start, stop, and status retrieval methods for each service.
- Added data processing, error handling, and statistics tracking across services.
- Integrated mock data generation for development and testing purposes.

example.env

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+# WiFi-DensePose API Environment Configuration Template
+# Copy this file to .env and modify the values according to your setup
+
+# =============================================================================
+# APPLICATION SETTINGS
+# =============================================================================
+
+# Application metadata
+APP_NAME=WiFi-DensePose API
+VERSION=1.0.0
+ENVIRONMENT=development  # Options: development, staging, production
+DEBUG=true
+
+# =============================================================================
+# SERVER SETTINGS
+# =============================================================================
+
+# Server configuration
+HOST=0.0.0.0
+PORT=8000
+RELOAD=true  # Auto-reload on code changes (development only)
+WORKERS=1    # Number of worker processes
+
+# =============================================================================
+# SECURITY SETTINGS
+# =============================================================================
+
+# IMPORTANT: Change these values for production!
+SECRET_KEY=your-secret-key-here-change-for-production
+JWT_ALGORITHM=HS256
+JWT_EXPIRE_HOURS=24
+
+# Allowed hosts (restrict in production)
+ALLOWED_HOSTS=*  # Use specific domains in production: example.com,api.example.com
+
+# CORS settings (restrict in production)
+CORS_ORIGINS=*  # Use specific origins in production: https://example.com,https://app.example.com
+
+# =============================================================================
+# DATABASE SETTINGS
+# =============================================================================
+
+# Database connection (optional - defaults to SQLite in development)
+# DATABASE_URL=postgresql://user:password@localhost:5432/wifi_densepose
+# DATABASE_POOL_SIZE=10
+# DATABASE_MAX_OVERFLOW=20
+
+# =============================================================================
+# REDIS SETTINGS (Optional - for caching and rate limiting)
+# =============================================================================
+
+# Redis connection (optional - defaults to localhost in development)
+# REDIS_URL=redis://localhost:6379/0
+# REDIS_PASSWORD=your-redis-password
+# REDIS_DB=0
+
+# =============================================================================
+# HARDWARE SETTINGS
+# =============================================================================
+
+# WiFi interface configuration
+WIFI_INTERFACE=wlan0
+CSI_BUFFER_SIZE=1000
+HARDWARE_POLLING_INTERVAL=0.1
+
+# Hardware mock settings (for development/testing)
+MOCK_HARDWARE=true
+MOCK_POSE_DATA=true
+
+# =============================================================================
+# POSE ESTIMATION SETTINGS
+# =============================================================================
+
+# Model configuration
+# POSE_MODEL_PATH=/path/to/your/pose/model.pth
+POSE_CONFIDENCE_THRESHOLD=0.5
+POSE_PROCESSING_BATCH_SIZE=32
+POSE_MAX_PERSONS=10
+
+# =============================================================================
+# STREAMING SETTINGS
+# =============================================================================
+
+# Real-time streaming configuration
+STREAM_FPS=30
+STREAM_BUFFER_SIZE=100
+WEBSOCKET_PING_INTERVAL=60
+WEBSOCKET_TIMEOUT=300
+
+# =============================================================================
+# FEATURE FLAGS
+# =============================================================================
+
+# Enable/disable features
+ENABLE_AUTHENTICATION=false  # Set to true for production
+ENABLE_RATE_LIMITING=false   # Set to true for production
+ENABLE_WEBSOCKETS=true
+ENABLE_REAL_TIME_PROCESSING=true
+ENABLE_HISTORICAL_DATA=true
+
+# Development features
+ENABLE_TEST_ENDPOINTS=true   # Set to false for production
+
+# =============================================================================
+# RATE LIMITING SETTINGS
+# =============================================================================
+
+# Rate limiting configuration
+RATE_LIMIT_REQUESTS=100
+RATE_LIMIT_AUTHENTICATED_REQUESTS=1000
+RATE_LIMIT_WINDOW=3600  # Window in seconds
+
+# =============================================================================
+# LOGGING SETTINGS
+# =============================================================================
+
+# Logging configuration
+LOG_LEVEL=INFO  # Options: DEBUG, INFO, WARNING, ERROR, CRITICAL
+LOG_FORMAT=%(asctime)s - %(name)s - %(levelname)s - %(message)s
+# LOG_FILE=/path/to/logfile.log  # Optional: specify log file path
+LOG_MAX_SIZE=10485760  # 10MB
+LOG_BACKUP_COUNT=5
+
+# =============================================================================
+# STORAGE SETTINGS
+# =============================================================================
+
+# Storage directories
+DATA_STORAGE_PATH=./data
+MODEL_STORAGE_PATH=./models
+TEMP_STORAGE_PATH=./temp
+MAX_STORAGE_SIZE_GB=100
+
+# =============================================================================
+# MONITORING SETTINGS
+# =============================================================================
+
+# Monitoring and metrics
+METRICS_ENABLED=true
+HEALTH_CHECK_INTERVAL=30
+PERFORMANCE_MONITORING=true
+
+# =============================================================================
+# API SETTINGS
+# =============================================================================
+
+# API configuration
+API_PREFIX=/api/v1
+DOCS_URL=/docs      # Set to null to disable in production
+REDOC_URL=/redoc    # Set to null to disable in production
+OPENAPI_URL=/openapi.json  # Set to null to disable in production
+
+# =============================================================================
+# PRODUCTION SETTINGS
+# =============================================================================
+
+# For production deployment, ensure you:
+# 1. Set ENVIRONMENT=production
+# 2. Set DEBUG=false
+# 3. Use a strong SECRET_KEY
+# 4. Configure proper DATABASE_URL
+# 5. Restrict ALLOWED_HOSTS and CORS_ORIGINS
+# 6. Enable ENABLE_AUTHENTICATION=true
+# 7. Enable ENABLE_RATE_LIMITING=true
+# 8. Set ENABLE_TEST_ENDPOINTS=false
+# 9. Disable API documentation URLs (set to null)
+# 10. Configure proper logging with LOG_FILE
+
+# Example production settings:
+# ENVIRONMENT=production
+# DEBUG=false
+# SECRET_KEY=your-very-secure-secret-key-here
+# DATABASE_URL=postgresql://user:password@db-host:5432/wifi_densepose
+# REDIS_URL=redis://redis-host:6379/0
+# ALLOWED_HOSTS=yourdomain.com,api.yourdomain.com
+# CORS_ORIGINS=https://yourdomain.com,https://app.yourdomain.com
+# ENABLE_AUTHENTICATION=true
+# ENABLE_RATE_LIMITING=true
+# ENABLE_TEST_ENDPOINTS=false
+# DOCS_URL=null
+# REDOC_URL=null
+# OPENAPI_URL=null
+# LOG_FILE=/var/log/wifi-densepose/app.log