Add Ragamuffin monorepo scaffold: Production-ready platform with LangFlow, FastAPI backend, React RAG UI, Milvus, n8n, security hardening, advanced RAG features, and enterprise capabilities

.env.example

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+# ============================================================
+# Ragamuffin Platform Environment Variables
+# ============================================================
+# This is a DEVELOPMENT configuration template.
+# For staging/production, use .env.staging.example or create .env.production
+# ============================================================
+
+# ----------------------
+# ENVIRONMENT
+# ----------------------
+ENVIRONMENT=development
+LOG_LEVEL=DEBUG
+
+# ----------------------
+# JWT AUTHENTICATION
+# ----------------------
+# Generate a secure secret: openssl rand -hex 32
+JWT_SECRET_KEY=dev-secret-change-in-production
+JWT_ALGORITHM=HS256
+ACCESS_TOKEN_EXPIRE_MINUTES=30
+REFRESH_TOKEN_EXPIRE_DAYS=7
+
+# ----------------------
+# CORS CONFIGURATION
+# ----------------------
+CORS_ORIGINS=http://localhost:8080,http://localhost:3000,http://localhost:5173
+
+# ----------------------
+# RATE LIMITING
+# ----------------------
+RATE_LIMIT_PER_MINUTE=100
+
+# ----------------------
+# OPENAI (Optional)
+# ----------------------
+# For advanced embeddings and LLM features
+# Get your API key from: https://platform.openai.com/api-keys
+OPENAI_API_KEY=
+
+# ----------------------
+# MILVUS CONFIGURATION
+# ----------------------
+MILVUS_HOST=milvus
+MILVUS_PORT=19530
+
+# ----------------------
+# RAG SERVICE
+# ----------------------
+EMBEDDING_MODEL=sentence-transformers/all-MiniLM-L6-v2
+RAG_SERVICE_URL=http://rag-service:8001
+
+# ----------------------
+# n8n WORKFLOW AUTOMATION
+# ----------------------
+# IMPORTANT: Change these in staging/production!
+N8N_BASIC_AUTH_USER=admin
+N8N_BASIC_AUTH_PASSWORD=admin
+
+# ----------------------
+# MINIO OBJECT STORAGE
+# ----------------------
+# IMPORTANT: Change these in staging/production!
+MINIO_ROOT_USER=minioadmin
+MINIO_ROOT_PASSWORD=minioadmin
+
+# ----------------------
+# RETELL.AI VOICE AI
+# ----------------------
+# Get your API key from: https://www.retell.ai/
+# Documentation: https://docs.retell.ai/
+RETELL_API_KEY=
+# Webhook secret for verifying Retell callbacks (optional but recommended)
+RETELL_WEBHOOK_SECRET=
+
+# ----------------------
+# SERVICE PORTS
+# ----------------------
+FRONTEND_PORT=8080
+BACKEND_PORT=8000
+RAG_SERVICE_PORT=8001
+LANGFLOW_PORT=7860
+N8N_PORT=5678
+MINIO_PORT=9000
+MINIO_CONSOLE_PORT=9001

.env.staging.example

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+# ============================================================
+# Ragamuffin Platform - Staging Environment Configuration
+# ============================================================
+# IMPORTANT: Copy this file to .env.staging and update all values
+#            before deploying to staging environment.
+#
+# Generate secrets with: openssl rand -hex 32
+# ============================================================
+
+# ----------------------
+# ENVIRONMENT
+# ----------------------
+ENVIRONMENT=staging
+LOG_LEVEL=INFO
+
+# ----------------------
+# JWT AUTHENTICATION
+# ----------------------
+# CRITICAL: Generate a new secret for staging: openssl rand -hex 32
+JWT_SECRET_KEY=YOUR_STAGING_JWT_SECRET_CHANGE_ME
+JWT_ALGORITHM=HS256
+ACCESS_TOKEN_EXPIRE_MINUTES=30
+REFRESH_TOKEN_EXPIRE_DAYS=7
+
+# ----------------------
+# CORS CONFIGURATION
+# ----------------------
+# Comma-separated list of allowed origins
+CORS_ORIGINS=http://localhost:8080,http://staging.yourdomain.com,https://staging.yourdomain.com
+
+# ----------------------
+# RATE LIMITING
+# ----------------------
+RATE_LIMIT_PER_MINUTE=100
+
+# ----------------------
+# MILVUS CONFIGURATION
+# ----------------------
+MILVUS_HOST=milvus
+MILVUS_PORT=19530
+MILVUS_METRICS_PORT=9091
+
+# ----------------------
+# RAG SERVICE
+# ----------------------
+RAG_SERVICE_PORT=8001
+EMBEDDING_MODEL=sentence-transformers/all-MiniLM-L6-v2
+RAG_SERVICE_URL=http://rag-service:8001
+
+# ----------------------
+# OPENAI (Optional)
+# ----------------------
+# For advanced embeddings and LLM features
+# Get API key from: https://platform.openai.com/api-keys
+OPENAI_API_KEY=
+
+# ----------------------
+# n8n WORKFLOW AUTOMATION
+# ----------------------
+# IMPORTANT: Change these default credentials!
+N8N_PORT=5678
+N8N_BASIC_AUTH_USER=stagingadmin
+N8N_BASIC_AUTH_PASSWORD=YOUR_STAGING_N8N_PASSWORD_CHANGE_ME
+N8N_PROTOCOL=http
+N8N_WEBHOOK_URL=http://staging.yourdomain.com:5678/
+# Generate encryption key: openssl rand -hex 32
+N8N_ENCRYPTION_KEY=YOUR_N8N_ENCRYPTION_KEY
+
+# ----------------------
+# MINIO OBJECT STORAGE
+# ----------------------
+# IMPORTANT: Change these default credentials!
+MINIO_PORT=9000
+MINIO_CONSOLE_PORT=9001
+MINIO_ROOT_USER=stagingadmin
+MINIO_ROOT_PASSWORD=YOUR_STAGING_MINIO_PASSWORD_CHANGE_ME
+
+# ----------------------
+# LANGFLOW
+# ----------------------
+LANGFLOW_PORT=7860
+
+# ----------------------
+# BACKEND API
+# ----------------------
+BACKEND_PORT=8000
+
+# ----------------------
+# FRONTEND
+# ----------------------
+FRONTEND_PORT=8080
+VITE_API_URL=http://staging.yourdomain.com:8000
+VITE_RAG_API_URL=http://staging.yourdomain.com:8001
+
+# ----------------------
+# DATABASE (Future Use)
+# ----------------------
+# For production, use PostgreSQL instead of in-memory
+# DATABASE_URL=postgresql://user:password@db-host:5432/ragamuffin_staging
+# REDIS_URL=redis://:password@redis-host:6379/0
+
+# ----------------------
+# MONITORING (Optional)
+# ----------------------
+# PROMETHEUS_ENABLED=true
+# GRAFANA_ENABLED=true
+# SENTRY_DSN=
+
+# ----------------------
+# EMAIL NOTIFICATIONS (Optional)
+# ----------------------
+# SMTP_HOST=smtp.gmail.com
+# SMTP_PORT=587
+# SMTP_USER=
+# SMTP_PASSWORD=