修复凭证测试器计数器、消除panic、补齐i18n

- credential_tester: testCredentialWithRetry返回ErrorType，修复网络错误计数器永久不递增的bug
- scanner: os.Exit(1)改为return，defer Cleanup可正常执行
- probe_parser: 5处panic改为error返回，调用链透传到init()
- common库: parsers/initialize/network/session共17处硬编码中文改用i18n
- services插件: 18个文件115处硬编码中文改用i18n
- locale: 补齐service/parser/network相关~25个中英文键

plugins/services/redis.go

@@ -135,7 +135,7 @@ func (p *RedisPlugin) doRedisAuth(ctx context.Context, info *common.HostInfo, cr
 			return &AuthResult{
 				Success:   false,
 				ErrorType: errType,
-				Error:     fmt.Errorf("redis认证失败: %s", strings.TrimSpace(responseStr)),
+				Error:     fmt.Errorf(i18n.GetText("service_auth_failed")+": %s", strings.TrimSpace(responseStr)),
 			}
 		}
 	}