feat(access-logs): 上报并展示边缘缓存状态 cache_status

OpenResty 日志输出 $upstream_cache_status；Agent/协议/ClickHouse 贯通入库。
明细列表与详情按 HIT/MISS 等推导命中、回源、未缓存三态标签。

internal/model/openflare_access_log_store.go

@@ -285,6 +285,7 @@ func toAnalyticsNodeAccessLog(record *OpenFlareAccessLog) analyticsmodel.NodeAcc
 		Host:          record.Host,
 		Path:          record.Path,
 		UserAgent:     record.UserAgent,
+		CacheStatus:   record.CacheStatus,
 		StatusCode:    openFlareAccessLogStatusCodeToInt32(record.StatusCode),
 		BytesSent:     bytesSent,
 		RequestLength: requestLength,
@@ -317,6 +318,7 @@ func fromAnalyticsNodeAccessLogs(rows []analyticsmodel.NodeAccessLog) []*OpenFla
 			Host:          row.Host,
 			Path:          row.Path,
 			UserAgent:     row.UserAgent,
+			CacheStatus:   row.CacheStatus,
 			StatusCode:    int(row.StatusCode),
 			BytesSent:     bytesSent,
 			RequestLength: requestLength,