Stabilize CI cleanup tests

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/__tests__/low-trust-red-team-routes.test.ts

@@ -68,6 +68,11 @@ async function waitFor(condition: () => boolean | Promise<boolean>, timeoutMs =
   throw new Error("Timed out waiting for condition");
 }
 
+function isHeartbeatRunEventFkError(error: unknown) {
+  const message = error instanceof Error ? `${error.message} ${String(error.cause ?? "")}` : String(error);
+  return message.includes("heartbeat_run_events_run_id_heartbeat_runs_id_fk");
+}
+
 async function deleteHeartbeatRunsAndWakeupsAfterActivityLogDrains(db: Db) {
   let lastError: unknown = null;
   for (let attempt = 0; attempt < 10; attempt += 1) {
@@ -80,6 +85,9 @@ async function deleteHeartbeatRunsAndWakeupsAfterActivityLogDrains(db: Db) {
       return;
     } catch (error) {
       lastError = error;
+      if (!isHeartbeatRunEventFkError(error)) {
+        throw error;
+      }
       await new Promise((resolve) => setTimeout(resolve, 25));
     }
   }