Refresh rate is honoured exactly everywhere: no list floor, sampler up to 10 s, server caches reduced to coalescing only

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

internal/cron/cron.go

@@ -390,7 +390,7 @@ var cronLogRe = regexp.MustCompile(`^\((\S+)\) CMD \((.*)\)$`)
 // lastRunsFromJournal maps user+command to the most recent "(user) CMD (command)" line.
 func (m *Manager) lastRunsFromJournal(ctx context.Context) map[string]int64 {
 	m.mu.Lock()
-	if time.Since(m.lastAt) < 60*time.Second && m.lastRuns != nil {
+	if time.Since(m.lastAt) < 5*time.Second && m.lastRuns != nil {
 		r := m.lastRuns
 		m.mu.Unlock()
 		return r