Python asyncio queue interleaves video series uploads instead of completing oldest first

Issue

The video upload system was incorrectly prioritizing parts from newer series over older ones, resulting in an interleaved upload pattern instead of completing older series first. For example, a 31-part series created earlier might have its parts mixed with a newer 17-part series, producing an upload order like of-17 part 1, of-31 part 1, of-17 part 2 rather than finishing the older series entirely.

Culprit

The sorting mechanism for the upload queue relied on a tuple-based comparison that prioritized series with fewer total parts over older series. Specifically, the comparison logic (0, series_part, series_total, creation_time) caused newer series with fewer parts to be processed first, as the series_total value was evaluated before creation_time in tuple comparisons.

Solution

The sort key was restructured to prioritize creation_time first, ensuring the oldest series is completed before newer ones begin. The tuple format was changed to (0, creation_time, series_part, series_total). This required updates to all references to the priority tuple indices in the system to maintain consistency.

Result: The system now processes all parts of older series sequentially before starting newer series, with correct part ordering within each series.