[PR] feat(metrics): default to 5.x native profile with multi-panel explorer and multi-cluster health overview [rocketmq-dashboard]

["lizhimins (via GitHub)" <gi...@apache.org>]

lizhimins opened a new pull request, #2838:
URL: https://github.com/apache/rocketmq-dashboard/pull/2838

   ## Problem
   
   - The metrics explorer defaulted to the first profile returned by `MetricProfileService.listProfiles()`, which was the 4.x exporter template. Deployments exposing 5.x native metrics showed "no data" for every default panel.
   - The cluster health overview only queried the single statically configured name server, so registered open-source instances were missing from the dashboard.
   - The explorer could only show one metric at a time and had no ad-hoc query entry.
   
   ## Changes
   
   **Backend**
   - Add `studio.metrics.prometheus.profile` (`PrometheusProperties`, default `rocketmq5-native`); `listProfiles()` puts the configured default profile first.
   - Fix the 5.x lag-latency mapping to the unit-suffixed metric name `rocketmq_consumer_lag_latency_milliseconds` (OTel Prometheus export appends units).
   - Broker Health now reports node online state (`min(up{...})`) instead of processor watermarks, which are constantly 0 on healthy low-traffic clusters; watermark aggregation switched to `by (cluster, node_id)` to avoid series explosion.
   - Add Topic Count / Consumer Group Count panels (5.x template 7 -> 9), using `max(...) by (cluster)` since counters are cluster-level values reported by every broker.
   - `RocketMQDashboardProvider` overview now aggregates all registered APACHE-vendor instances; unreachable instances contribute a warning row instead of failing the page; falls back to the static name server when no instance is registered.
   
   **Frontend**
   - `MetricsExplorer` queries all metrics of the selected profile concurrently in a responsive grid (one panel per metric), plus a custom PromQL query panel.
   - Selected profile persisted to localStorage; charts cap legends at top-10 series by latest value; axis label/line sizing tuned for small panels.
   
   ## Tests
   
   - `MetricProfileServiceTest` (12), `RocketMQDashboardProviderTest` (28), `MetricsExplorer.test.tsx` (19) all green; full frontend suite 737 green; `tsc --noEmit` and `npm run build` pass.
   - Verified against a live 5.x deployment: default profile first, real data on all panels, 24 topics / 15 groups counted.
   


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Re: [PR] feat(metrics): default to 5.x native profile with multi-panel explorer and multi-cluster health overview [rocketmq-dashboard]

["lizhimins (via GitHub)" <gi...@apache.org>]

lizhimins merged PR #2838:
URL: https://github.com/apache/rocketmq-dashboard/pull/2838


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