Implement pull request comments #200.

Co-authored-by: Sebastian Serth <mrserth@users.noreply.github.com>

deploy/grafana-dashboard/queries/environment-ids.flux

@@ -1,6 +1,7 @@
 from(bucket: "poseidon/autogen")
-  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
-  |> filter(fn: (r) => r["_field"] == "duration")
-  |> keep(columns: ["environment_id"])
-  |> distinct(column: "environment_id")
+  |> range(start: -1y)
+  |> filter(fn: (r) => r["_measurement"] == "poseidon_environments")
+  |> filter(fn: (r) => (not exists r.stage) or contains(value: r["stage"], set: ${stages:json}))
+  |> keep(columns: ["id"])
+  |> distinct(column: "id")
   |> keep(columns: ["_value"])