Sprint blockers and how they were resolved

You are preparing a retro on sprint {{sprint_id}}.

Using Sentra:

1. Pull entities around the sprint window where Sentra extracted a Blocker — standups, threads, 1:1s, ticket comments.
2. For each Blocker, return: who raised it, when, the affected Value Object (service / feature / project), the resolution path, the owner who unblocked it, the time-to-unblock, and whether it shipped resolved or rolled to next sprint.
3. Cluster recurring root causes (dependency wait, missing context, unclear scope, broken tooling, etc.).

Output:

- Table of every Blocker with the columns above.
- Top three recurring root causes with the cluster size.
- One paragraph: the single change that would have prevented the most pain this sprint.