Rankings dataset citation

Stored citation on each OpenRouter rankings file. Daily, audio, image, image output, and tool calling each store Source: OpenRouter (openrouter.ai/rankings), as of {as_of}. The label is the rankings file. The value is the stored citation string, including the stored {as_of} placeholder. The bar is full when a citation is stored. The bar is not a score. This is the dataset citation, not the dataset license and not the dataset request. A file with no stored citation stays off the page.