fix(workbench): reuse message facts for session list summary (#1933)

internal/workbenchruntime/service.go

@@ -1238,18 +1238,17 @@ func (s *Server) querySummaryFacts(ctx context.Context, sessions []map[string]an
 	traceIDs := uniqueStrings(mapSessions(sessions, lastTraceID))
 	facts := emptyFacts()
 	type summaryFactsResult struct {
-		kind             string
-		messageSummaries []any
-		facts            map[string][]any
-		err              error
+		kind  string
+		facts map[string][]any
+		err   error
 	}
 	resultCount := 0
 	results := make(chan summaryFactsResult, 2)
 	if len(sessionIDs) > 0 {
 		resultCount++
 		go func() {
-			messageSummaries, err := s.queryMessageSummaries(ctx, sessionIDs)
-			results <- summaryFactsResult{kind: "messageSummaries", messageSummaries: messageSummaries, err: err}
+			messageFacts, err := s.queryFacts(ctx, factQuery{SessionIDs: sessionIDs, Families: []string{"messages"}, MessagesOrder: "updated_asc"})
+			results <- summaryFactsResult{kind: "messageFacts", facts: messageFacts, err: err}
 		}()
 	}
 	if len(traceIDs) > 0 {
@@ -1265,8 +1264,8 @@ func (s *Server) querySummaryFacts(ctx context.Context, sessions []map[string]an
 			return nil, result.err
 		}
 		switch result.kind {
-		case "messageSummaries":
-			facts["messageSummaries"] = result.messageSummaries
+		case "messageFacts":
+			facts = mergeFacts(facts, result.facts)
 		case "traceFacts":
 			facts = mergeFacts(facts, result.facts)
 		}