feat: 实现 SQLite 迁移备份、完整表结构与简单写入队列

cmd/nixmsg/serve.go

@@ -35,16 +35,12 @@ func runServe(ctx context.Context, cfg config.Config) error {
 		return fmt.Errorf("mkdir data_dir: %w", err)
 	}
 
-	db, err := store.OpenWriter(cfg.DataDir, cfg.SQLiteSynchronous)
+	db, err := store.Open(cfg.DataDir, cfg.SQLiteSynchronous)
 	if err != nil {
 		return err
 	}
 	defer func() { _ = db.Close() }()
 
-	if migErr := store.Migrate(db); migErr != nil {
-		return migErr
-	}
-
 	mux := http.NewServeMux()
 	mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, _ *http.Request) {
 		w.WriteHeader(http.StatusOK)