Reduce auto-sync delays for better UX

- Reduce flush debounce from 5s to 1s (BEADS_FLUSH_DEBOUNCE)
- Reduce daemon poll interval from 10s to 2s
- Makes issue changes sync much faster to JSONL and git

internal/config/config.go

@@ -80,7 +80,7 @@ func Initialize() error {
 	_ = v.BindEnv("auto-start-daemon", "BEADS_AUTO_START_DAEMON")
 	
 	// Set defaults for additional settings
-	v.SetDefault("flush-debounce", "5s")
+	v.SetDefault("flush-debounce", "1s")
 	v.SetDefault("auto-start-daemon", true)
 
 	// Read config file if it exists (don't error if not found)