add pg vector and embed

.env.example

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+# =================================
+# APPLICATION CONFIGURATION
+# =================================
+
+# Environment mode: development, staging, production
+NODE_ENV=development
+
+# Application port
+PORT=3000
+
+# Application host (for binding)
+HOST=localhost
+
+# Application base URL (for CORS and other purposes)
+APP_URL=http://localhost:3000
+
+# =================================
+# DATABASE CONFIGURATION
+# =================================
+
+# PostgreSQL Database URL
+# Format: postgresql://username:password@host:port/database_name
+DATABASE_URL=postgresql://username:password@localhost:5432/claim_guard
+
+# Database connection pool settings
+DB_POOL_MIN=2
+DB_POOL_MAX=10
+
+# =================================
+# CORS CONFIGURATION
+# =================================
+
+# Allowed origins for CORS (comma-separated)
+# Use * for allow all origins (NOT recommended for production)
+# Examples:
+# - Development: http://localhost:3000,http://localhost:3001
+# - Production: https://yourdomain.com,https://www.yourdomain.com
+CORS_ORIGINS=http://localhost:3000,http://localhost:3001,http://localhost:8080
+
+# Allowed methods for CORS (comma-separated)
+CORS_METHODS=GET,HEAD,PUT,PATCH,POST,DELETE,OPTIONS
+
+# Allowed headers for CORS (comma-separated)
+CORS_HEADERS=Content-Type,Accept,Authorization,X-Requested-With
+
+# Allow credentials in CORS requests
+CORS_CREDENTIALS=true
+
+# =================================
+# SECURITY CONFIGURATION
+# =================================
+
+# JWT Secret for authentication (generate strong secret for production)
+JWT_SECRET=your-super-secret-jwt-key-change-this-in-production
+
+# JWT Token expiration time
+JWT_EXPIRES_IN=24h
+
+# JWT Refresh token expiration
+JWT_REFRESH_EXPIRES_IN=7d
+
+# API Rate limiting (requests per minute)
+RATE_LIMIT_MAX=100
+
+# =================================
+# LOGGING CONFIGURATION
+# =================================
+
+# Log level: error, warn, info, debug, verbose
+LOG_LEVEL=info
+
+# Log format: json, simple
+LOG_FORMAT=simple
+
+# Enable request logging
+LOG_REQUESTS=true
+
+# =================================
+# FILE UPLOAD CONFIGURATION
+# =================================
+
+# Maximum file size for uploads (in bytes)
+# 10MB = 10485760, 50MB = 52428800
+MAX_FILE_SIZE=10485760
+
+# Allowed file types for upload (comma-separated)
+ALLOWED_FILE_TYPES=.xlsx,.xls,.csv
+
+# Upload directory path
+UPLOAD_DIR=./uploads
+
+# =================================
+# CACHE CONFIGURATION
+# =================================
+
+# Redis URL for caching (optional)
+# REDIS_URL=redis://localhost:6379
+
+# Cache TTL in seconds (default: 1 hour)
+CACHE_TTL=3600
+
+# =================================
+# EMAIL CONFIGURATION (Optional)
+# =================================
+
+# SMTP configuration for sending emails
+# SMTP_HOST=smtp.gmail.com
+# SMTP_PORT=587
+# SMTP_SECURE=false
+# SMTP_USER=your-email@gmail.com
+# SMTP_PASS=your-email-password
+
+# Email from address
+# EMAIL_FROM=noreply@yourdomain.com
+
+# =================================
+# THIRD-PARTY INTEGRATIONS
+# =================================
+
+# External API keys
+# EXTERNAL_API_KEY=your-api-key
+# EXTERNAL_API_URL=https://api.external-service.com
+
+# =================================
+# DEVELOPMENT SETTINGS
+# =================================
+
+# Enable API documentation (Swagger)
+ENABLE_DOCS=true
+
+# Enable debug mode
+DEBUG=true
+
+# Enable database logging
+DB_LOGGING=true
+
+# =================================
+# PRODUCTION SETTINGS
+# =================================
+
+# When NODE_ENV=production, ensure these are set:
+# - Strong JWT_SECRET
+# - Specific CORS_ORIGINS (not *)
+# - DB_LOGGING=false
+# - DEBUG=false
+# - LOG_LEVEL=warn or error
+
+# Health check endpoint settings
+HEALTH_CHECK_ENABLED=true
+
+# Request timeout in milliseconds
+REQUEST_TIMEOUT=30000
+
+# =================================
+# ICD SPECIFIC CONFIGURATION
+# =================================
+
+# Path to ICD data files
+ICD9_FILE_PATH=./test/[PUBLIC] ICD-9CM e-klaim.xlsx
+ICD10_FILE_PATH=./test/[PUBLIC] ICD-10 e-klaim.xlsx
+
+# ICD import batch size
+ICD_IMPORT_BATCH_SIZE=1000
+
+# =================================
+# MONITORING & METRICS
+# =================================
+
+# Enable application metrics
+METRICS_ENABLED=true
+
+# Metrics endpoint path
+METRICS_PATH=/metrics
+
+# Enable health check endpoint
+HEALTH_CHECK_PATH=/health
+
+OPENAI_API_KEY=xxxxxx
+OPENAI_API_MODEL=text-embedding-ada-002