* [mics] fix "app" label in clsi-cache metrics in dev-env
* [clsi-cache] validate filePath when processing file
* [clsi-cache] meter ingress and egress bandwidth
Files are downloaded directly from nginx, hence we cannot meter egress
in clsi-cache easily.
GitOrigin-RevId: 24de8c41728f0e9c984113c1470dec6153e75f20