Slack Discover Preview shows different interval visualization than graphed query in Sentry

### Environment SaaS (https://sentry.io/) ### Steps to Reproduce 1. Create a discover query with Bar Chart display type and 1h interval 2. Copy the link and paste it in Slack ### Expected Result I would expect the Bar Chart visualization in the Slack preview to have the same bar chart series as the discover query created ### Actual Result The bar chart series in the slack preview are finer, more granular than the discover query created <img width="503" height="222" alt="Image" src="https://github.com/user-attachments/assets/3ec2ca4b-7536-4be2-b494-b6feb903de16" /> <img width="1627" height="621" alt="Image" src="https://github.com/user-attachments/assets/6023ce00-f975-4fd1-b859-19561e3ff768" /> ### Product Area Discover ### Link _No response_ ### DSN _No response_ ### Version _No response_