grafana-lokiexplore-app cannot query VictoriaLogs. Its volume views call
/loki/api/v1/index/volume, which VictoriaLogs does not implement and
answers "unsupported path requested", and upstream's position is that
the datasource plugin must provide drilldown support. No configuration
here changes that, so the app only ever offered a menu entry that looks
like a broken feature rather than an absent one.
The option's own description already ruled its siblings out for fronting
backends this swarm does not run. That premise expired when the swarm
gained a log store, which is what made adding this one look reasonable —
so the reason is rewritten rather than the list alone: Logs Drilldown is
excluded on compatibility, not on absence.
Explore with the VictoriaLogs datasource is the log browser, and
docs/swarm/services.md now says so where an operator looks for it.
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