Annotations: annotations from the Infinity datasource always render at $__timeFrom

### What happened? We are trying to add some manual annotations from an Infinity data source with inline CSV data, but all annotations are rendered at $__timeFrom no matter what their timestamp says. https://github.com/user-attachments/assets/1e208627-d841-452b-8c20-cbdac97d3e78 ### What did you expect to happen? The annotations are rendered properly ### Did this work before? Don't know ### How do we reproduce it? 1. Create a new annotations query 2. Use the Infinity data source 3. Enter CSV data 4. Go back to panels [Annotation from Infinity Data Source-1763479425276.json](https://github.com/user-attachments/files/23608724/Annotation.from.Infinity.Data.Source-1763479425276.json) ### Is the bug inside a dashboard panel? No ### Environment (with versions)? Grafana: 12.2.1 OS: Ubuntu 25.10 Browser: Vivaldi ### Grafana platform? Kubernetes ### Datasource(s)? Infinity 3.6.0