createScrapeClient

createScrapeClient({
  providers?: ScrapeProvider[];
  provider?: ScrapeProvider;          // alias for a single primary
  fallback?: ScrapeProvider | ScrapeProvider[];
  timeoutMs?: number;                 // default 30000, abortable
  retries?: number;                   // extra attempts per provider on retryable errors; default 1
  strategy?: "priority" | "cost";
  cache?: boolean | { ttlMs?: number; maxEntries?: number };
  onFailover?: (error: Error, from: string, to: string) => void;
})

fromEnv() // builds providers from process.env keys, always ends with jina + local