merge: 合并main分支最新改动

解决冲突：
- backend/internal/config/config.go: 合并Ops和Dashboard配置
- backend/internal/server/api_contract_test.go: 合并handler初始化
- backend/internal/service/openai_gateway_service.go: 保留Ops错误追踪逻辑
- backend/internal/service/wire.go: 合并Ops和APIKeyAuth provider

主要合并内容：
- Dashboard缓存和预聚合功能
- API Key认证缓存优化
- Codex转换支持
- 使用日志分区表

deploy/.env.example

@@ -69,6 +69,33 @@ JWT_EXPIRE_HOUR=24
 # Leave unset to use default ./config.yaml
 #CONFIG_FILE=./config.yaml
 
+# -----------------------------------------------------------------------------
+# Dashboard Aggregation (Optional)
+# -----------------------------------------------------------------------------
+# Enable aggregation job
+# 启用仪表盘预聚合
+DASHBOARD_AGGREGATION_ENABLED=true
+# Refresh interval (seconds)
+# 刷新间隔（秒）
+DASHBOARD_AGGREGATION_INTERVAL_SECONDS=60
+# Lookback window (seconds)
+# 回看窗口（秒）
+DASHBOARD_AGGREGATION_LOOKBACK_SECONDS=120
+# Allow manual backfill
+# 允许手动回填
+DASHBOARD_AGGREGATION_BACKFILL_ENABLED=false
+# Backfill max range (days)
+# 回填最大跨度（天）
+DASHBOARD_AGGREGATION_BACKFILL_MAX_DAYS=31
+# Recompute recent N days on startup
+# 启动时重算最近 N 天
+DASHBOARD_AGGREGATION_RECOMPUTE_DAYS=2
+# Retention windows (days)
+# 保留窗口（天）
+DASHBOARD_AGGREGATION_RETENTION_USAGE_LOGS_DAYS=90
+DASHBOARD_AGGREGATION_RETENTION_HOURLY_DAYS=180
+DASHBOARD_AGGREGATION_RETENTION_DAILY_DAYS=730
+
 # -----------------------------------------------------------------------------
 # Security Configuration
 # -----------------------------------------------------------------------------