style: 合入后修 gofmt/govet 与 RegistrationView 类型检查

internal/store/queue_test.go

@@ -208,8 +208,8 @@ ON CONFLICT(key) DO UPDATE SET value = excluded.value, updated_at = excluded.upd
 		}()
 	}
 	time.Sleep(2 * time.Millisecond)
-	if err := db.Queue.Close(); err != nil {
-		t.Fatal(err)
+	if closeErr := db.Queue.Close(); closeErr != nil {
+		t.Fatal(closeErr)
 	}
 	wg.Wait()
 
@@ -232,21 +232,21 @@ func TestQueueCheckpointTruncatesWAL(t *testing.T) {
 	payload := strings.Repeat("x", 4096)
 	for i := 0; i < 300; i++ {
 		i := i
-		if err := db.Queue.Do(ctx, func(tx *sql.Tx) error {
+		if doErr := db.Queue.Do(ctx, func(tx *sql.Tx) error {
 			_, e := tx.Exec(
 				`INSERT INTO settings(key, value, updated_at) VALUES(?, ?, ?)`,
 				fmt.Sprintf("wal_%d", i), payload, time.Now().UnixMilli(),
 			)
 			return e
-		}); err != nil {
-			t.Fatal(err)
+		}); doErr != nil {
+			t.Fatal(doErr)
 		}
 	}
 
 	walPath := filepath.Join(dir, DBFileName+"-wal")
 	before, statErr := os.Stat(walPath)
-	if err := db.Checkpoint(ctx); err != nil {
-		t.Fatal(err)
+	if cpErr := db.Checkpoint(ctx); cpErr != nil {
+		t.Fatal(cpErr)
 	}
 	if statErr != nil {
 		return