fix: Linter errors

Fixed:
- "ineffective break statement. Did you mean to break out of the outer loop?" (SA4011)
- "channels used with os/signal.Notify should be buffered" (SA1017)
- "os.Kill cannot be trapped (did you mean syscall.SIGTERM?)" (SA1016)
- "func envOrDefaultBool is unused" (U1000)
- "should use time.Since instead of time.Now().Sub" (S1012)

analyzer/tcp/socks.go

@@ -208,10 +208,10 @@ func (s *socksStream) parseSocks5ReqMethod() utils.LSMAction {
 		switch method {
 		case Socks5AuthNotRequired:
 			s.authReqMethod = Socks5AuthNotRequired
-			break
+			return utils.LSMActionNext
 		case Socks5AuthPassword:
 			s.authReqMethod = Socks5AuthPassword
-			break
+			return utils.LSMActionNext
 		default:
 			// TODO: more auth method to support
 		}