clean: remove deprecated utils/ package

- Remove all 5 files from utils/ (serial.go, socket.go, pulsar.go,
  sqlite.go, telegram.go)
- cmd/root.go: remove utils import and all utils. references
- cmd/test.go: rewrite to use serial, storage, transport packages directly
  with proper error logging via zap

cmd/root.go

@@ -26,7 +26,6 @@ import (
 	"go.uber.org/zap/zapcore"
 
 	"it2000.com.cn/tele-recv/config"
-	"it2000.com.cn/tele-recv/utils"
 )
 
 const ModeName = "TELEGRAM_MODE"
@@ -77,7 +76,6 @@ func init() {
 	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 
 	initLog()
-	utils.Log = logger
 }
 
 // initConfig reads in config file and ENV variables if set.
@@ -89,7 +87,7 @@ func initConfig() {
 	}
 	appCfg = cfg
 
-	// Populate legacy globals for backward compatibility
+	// Populate legacy globals
 	device = cfg.Serial.Device
 	baudrate = cfg.Serial.Baudrate
 	lograw = cfg.Serial.LogRaw
@@ -101,8 +99,6 @@ func initConfig() {
 	name = cfg.Pulsar.Name
 	tcp = cfg.Telegram.TCP
 	pulsar = cfg.Telegram.Pulsar
-	utils.Tcp = tcp
-	utils.Pulsar = pulsar
 }
 
 func initLog() {
@@ -115,15 +111,6 @@ func initLog() {
 		panic(err)
 	}
 
-	rawFile := "./logs/raw-%Y-%m-%d-%H.txt"
-	utils.RawLog, err = rotatelogs.New(
-		rawFile,
-		rotatelogs.WithMaxAge(60*24*time.Hour),
-		rotatelogs.WithRotationTime(time.Hour))
-	if err != nil {
-		panic(err)
-	}
-
 	filePriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
 		return lvl >= zapcore.DebugLevel
 	})