chore: 统一本地服务器与远程仓库源码

- 合并 main 与 master 历史并以服务器结构为基线
- 保留迁移、数据保留、AWS 账单与部署安全能力
- 建立 SDD 规格和 CI 验证闭环

backend/config/config.go

@@ -9,15 +9,24 @@ import (
 
 // Config 应用配置
 type Config struct {
-	Mode      string         `mapstructure:"mode"`
-	Port      string         `mapstructure:"port"`
-	LogLevel  string         `mapstructure:"log_level"`
-	Database  DatabaseConfig `mapstructure:"database"`
-	JWT       JWTConfig      `mapstructure:"jwt"`
-	Redis     RedisConfig    `mapstructure:"redis"`
+	Mode      string          `mapstructure:"mode"`
+	Port      string          `mapstructure:"port"`
+	LogLevel  string          `mapstructure:"log_level"`
+	Database  DatabaseConfig  `mapstructure:"database"`
+	JWT       JWTConfig       `mapstructure:"jwt"`
+	Agent     AgentConfig     `mapstructure:"agent"`
+	Retention RetentionConfig `mapstructure:"retention"`
+	Billing   BillingConfig   `mapstructure:"billing"`
+	Redis     RedisConfig     `mapstructure:"redis"`
 	Websocket WebsocketConfig `mapstructure:"websocket"`
 }
 
+// BillingConfig 定义云账单报告本位币及各原币种折算到 CNY 的汇率。 // Logan.Li
+type BillingConfig struct {
+	BaseCurrency  string             `mapstructure:"base_currency"`
+	ExchangeRates map[string]float64 `mapstructure:"exchange_rates"`
+}
+
 // DatabaseConfig 数据库配置
 type DatabaseConfig struct {
 	Driver   string `mapstructure:"driver"`
@@ -37,9 +46,25 @@ type JWTConfig struct {
 	ExpireHour int    `mapstructure:"expire_hour"`
 }
 
+// AgentConfig Agent 接入安全配置。 // Logan.Li
+type AgentConfig struct {
+	EnforceAuth bool `mapstructure:"enforce_auth"`
+}
+
+// RetentionConfig 高频数据保留期配置，单位为天。 // Logan.Li
+type RetentionConfig struct {
+	AgentReportsDays    int `mapstructure:"agent_reports_days"`
+	MetricHistoryDays   int `mapstructure:"metric_history_days"`
+	MetricAggregateDays int `mapstructure:"metric_aggregate_days"`
+	SNMPSamplesDays     int `mapstructure:"snmp_samples_days"`
+	SiteResultsDays     int `mapstructure:"site_results_days"`
+	LogEntriesDays      int `mapstructure:"log_entries_days"`
+	CleanupBatchSize    int `mapstructure:"cleanup_batch_size"`
+}
+
 // RedisConfig Redis配置
 type RedisConfig struct {
-	Driver   string `mapstructure:"driver"`   // redka (内嵌) / redis (外部)
+	Driver   string `mapstructure:"driver"` // redka (内嵌) / redis (外部)
 	Host     string `mapstructure:"host"`
 	Port     int    `mapstructure:"port"`
 	Password string `mapstructure:"password"`
@@ -71,6 +96,17 @@ func Load() *Config {
 	viper.SetDefault("database.max_conn", 100)
 	viper.SetDefault("database.max_idle", 10)
 	viper.SetDefault("jwt.expire_hour", 24)
+	viper.SetDefault("agent.enforce_auth", false)
+	viper.SetDefault("retention.agent_reports_days", 7)
+	viper.SetDefault("retention.metric_history_days", 30)
+	viper.SetDefault("retention.metric_aggregate_days", 365)
+	viper.SetDefault("retention.snmp_samples_days", 30)
+	viper.SetDefault("retention.site_results_days", 30)
+	viper.SetDefault("retention.log_entries_days", 30)
+	viper.SetDefault("retention.cleanup_batch_size", 10000)
+	viper.SetDefault("billing.base_currency", "CNY")
+	viper.SetDefault("billing.exchange_rates.CNY", 1.0)
+	viper.SetDefault("billing.exchange_rates.USD", 7.2)
 	viper.SetDefault("redis.host", "localhost")
 	viper.SetDefault("redis.port", 6379)
 	viper.SetDefault("redis.driver", "redka")