Handle images processed by multiple pipelines

[annavik]

Background
Comment from Tessa: "If images in the session have been processed by multiple pipelines: should it display any processed image, or only images processed by a particular pipeline? Is there a way to tell which images were processed by which pipeline, e.g. maybe using additional colors besides the blue to indicate them?"

Summary
Currently the session detail view is assuming each image has only been processed by one pipeline. We need some UI adjustments to handle the case where multiple pipelines have been involved. Probably also an extended BE response for session details and timeline.

Some thoughts
Users might want to inspect results from one pipeline at once, to reduce cognitive load. At the same time, users might want to inspects results from multiple pipelines at once, for comparison. Some solution that offers both variants? UI to be defined as part of this task.

[mihow]

Thank you for summarizing this issue @annavik.