Stored rankings end

Stored last date for each OpenRouter rankings section in the digest. rankings_daily, rankings_tool_calling, and rankings_image_output each store 2026-10-27. The label is the stored section name. The value is the stored last_date. Bar length runs from the earliest date on this page to the latest. These three dates are the same, so the bars are equal. These dates are separate from the day count and from the file start date. A section with no stored last date stays off the page.