feat(admin): add MinIO-compatible diagnostics and service-control endpoints
Register and implement MinIO admin API compatibility routes:
- POST /v3/service: restart/stop trigger the existing graceful-shutdown
path; freeze/unfreeze record advisory state (request admission is not
yet gated, surfaced honestly via effective=false)
- profiling/trace and healthinfo/obdinfo/log diagnostics endpoints
- GET /v3/top/locks and POST /v3/force-unlock, backed by new
FastObjectLockManager::list_locks()/force_unlock() introspection
- speedtest routes where feasible
Refs rustfs/backlog#604 #606#607#615
cxymds