feat: 新增卡状态轮询任务类型常量及 verbose_log 配置

constants.go: 新增 TaskTypePollingCardStatus = "polling:card_status"
config.go: 新增 PollingConfig struct 含 VerboseLog bool
config.yaml: polling.verbose_log 默认 false

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

pkg/config/config.go

@@ -25,6 +25,7 @@ type Config struct {
 	Storage            StorageConfig            `mapstructure:"storage"`
 	Gateway            GatewayConfig            `mapstructure:"gateway"`
 	PollingAutoTrigger PollingAutoTriggerConfig `mapstructure:"polling_auto_trigger"`
+	Polling            PollingConfig            `mapstructure:"polling"`
 }
 
 // ServerConfig HTTP 服务器配置
@@ -140,6 +141,13 @@ type GatewayConfig struct {
 	Timeout   int    `mapstructure:"timeout"`    // 超时时间（秒）
 }
 
+// PollingConfig 轮询通用配置
+type PollingConfig struct {
+	// VerboseLog 开启后，所有轮询 handler 在成功获取上游数据时以 Info 级别输出详细日志
+	// 环境变量：JUNHONG_POLLING_VERBOSE_LOG
+	VerboseLog bool `mapstructure:"verbose_log"`
+}
+
 // PollingAutoTriggerConfig 轮询自动触发配置
 type PollingAutoTriggerConfig struct {
 	// EnableAutoTrigger 是否启用C端实名自动触发