Stored session window days

Stored session-cost window length from the digest. window_days is 30. The window ends 2026-10-25, and the pull is as of 2026-10-26T10:00:35.514Z. The session file has 637 rows. The task-classification window is 7 days. The label is the stored key. With one stored length, the bar is full. This length is separate from the window end date and from the median session cost. A missing length stays off the page.