Function flushAllDetached

flushAllDetached(opts?: FlushOptions): Promise<FlushResult>
Wait for every in-flight detached handle to reach a terminal state. Returns counts for diagnostics. PROCESS-WIDE — drains every driver across every executor. For per-executor scoping, consumers should collect their own handles from executor.detachAndJoinLater(...) calls and await Promise.allSettled([...].map(h => h.wait())) themselves.
Parameters
- Optionalopts: FlushOptions
Returns Promise<FlushResult>
Example: Graceful server shutdown
```
import { flushAllDetached } from 'footprintjs/detach';

process.on('SIGTERM', async () => {
  const stats = await flushAllDetached({ timeoutMs: 10_000 });
  console.log(`Drained ${stats.done} done, ${stats.failed} failed, ${stats.pending} pending.`);
  process.exit(stats.pending === 0 ? 0 : 1);
});
```
- Defined in lib/detach/flush.ts:74