swarm-controller: record builder runs with nix's tail and link the status to them

swarm-controller/src/github_account.rs

@@ -139,6 +139,7 @@ mod tests {
             try_outs: super::super::review_classifier::TryOuts::default(),
             reviews: std::sync::Arc::default(),
             runs: crate::review_classifier::runs::Runs::Live(None),
+            builds: crate::builder::runs::Builds::Live(None),
             alerts: None,
         }
     }