Billing and Invoicing

interface UsageMetrics {
  period: string;
  llm_tokens: { used: number; limit: number; percentage: number };
  queries: { used: number; limit: number; percentage: number };
  storage_gb: { used: number; limit: number; percentage: number };
  api_requests: { used: number; limit: number; percentage: number };
}

interface CostBreakdown {
  period: string;
  total_usd: number;
  by_service: {
    ai_service: { llm_cost: number; compute_cost: number };
    query_engine: { query_cost: number; storage_cost: number };
    ml_service: { training_cost: number; serving_cost: number };
  };
  by_user: Array<{ user_id: string; name: string; cost_usd: number }>;
}