How do you reliably wait for the completion of a large, asynchronous data grid load in Playwright?

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### Question
How do you reliably wait for the completion of a large, asynchronous data grid load in Playwright?

### Answer
A high-volume enterprise application uses a dynamic data grid component. This grid fetches data in chunks (pagination/virtual scrolling) and renders rows asynchronously as they arrive from a backend API. The component does not expose a simple loading spinner that can be reliably targeted and waited upon.

You need to write a test that asserts that the grid has successfully loaded and rendered at least 50 rows, but the grid component itself is constantly receiving and rendering new rows in the background until a final state is reached.

Given this scenario, describe a production-grade strategy using Playwright to reliably confirm that the data grid has finished its initial load cycle and is stable enough for further interaction. Focus on the best practice for asserting the completion of a dynamic, multi-state asynchronous rendering process, rather than relying on simple time-based waits. Provide a conceptual code snippet illustrating the approach.

How do you reliably wait for the completion of a large, asynchronous data grid load in Playwright?

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