Summary links should have a filter for tasks only set

The BVS Summary generated at the end is missing the tasks filter for links targeting the timeline view, which might be confusing at first, if the summary is showing only one task executed, but a task and a bunch of (probably connected) transform executions are showing in the timeline view when clicking on a link in BVS.

Start by locating the BVS Summary generation and the code that builds links targeting the timeline view. Reproduce the summary described in the issue, then verify that timeline links apply a tasks-only filter and that the resulting view shows only the task execution.

Written by the indexing model from the issue text.