flags@4.0.6

Patch Changes

• c08f3e5: Improve performance by caching next/headers imports.

  Previously every flag evaluation in Next.js App Router would run
  await import("next/headers"). The imported module is cached by
  the runtime, but we would still go through the event loop unnecessarily.

  Now we cache the resolved module in a local variable so only the
  first call awaits the dynamic import; subsequent calls skip the
  microtask entirely.

• c08f3e5: Reduce microtask queue overhead in flag evaluation by replacing the async IIFE around decide() with a direct call and Promise.resolve().