feat(obs): add bounded metrics dimensions (#5645)

* feat(obs): add drive topology detail metrics

Expose additive drive info, topology, state, and per-drive API metrics while preserving the existing drive metric label sets.

Backlog: rustfs/backlog#1655

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): preserve suspect drive runtime state

Keep suspect as a bounded drive runtime state and avoid all-zero runtime_state samples for that storage health state.

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): skip unknown drive inode samples

Avoid exporting zero inode gauges for missing or stale drive snapshots and ignore zero-count API latency buckets.

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): add scanner source work detail metrics

Expose additive scanner source and cycle work metrics with bounded server/source/state labels while leaving the existing aggregate scanner metrics unchanged.

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): add ilm action detail metrics

Expose additive ILM action/state task metrics with a server label while preserving the existing aggregate ILM series.

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): add delivery target server metrics

Expose additive audit and notification delivery target metrics with server labels and extend removed-target tombstones for the server-aware series.

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): add replication target flow metrics

Expose additive bucket replication target sent and failed-flow metrics while preserving existing bucket aggregates and target backlog series.

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): add request server metrics

Expose additive API request metrics with server labels while preserving the existing request and traffic metric label sets.

Co-Authored-By: heihutu <heihutu@gmail.com>

* style(obs): apply rustfmt to metrics changes

Apply rustfmt output to the metrics dimension changes without altering behavior.

Co-Authored-By: heihutu <heihutu@gmail.com>

* style(obs): reuse audit target label constant

Use the exported audit target_id label constant for legacy audit target metrics.

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): populate drive disk metrics

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): add scanner bucket drive result metrics

Co-Authored-By: heihutu <heihutu@gmail.com>

* feat(obs): add replication proxy server metrics

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): address metric liveness review

Use checked division for drive API latency aggregation and keep recovered drive, scanner current-cycle, replication flow, audit target, and notification target series from retaining stale values.

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): address metric dimension review

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): address additional metric review

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): count drive calls at start

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(obs): address metrics dimension review

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(metrics): address dimension review gaps

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(metrics): address scanner review follow-ups

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(metrics): address runtime review follow-ups

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(metrics): reduce disk metric contention

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(metrics): address runtime review follow-ups

Co-Authored-By: heihutu <heihutu@gmail.com>

* fix(metrics): retire stale dimension series

Co-Authored-By: heihutu <heihutu@gmail.com>

---------

Co-authored-by: heihutu <heihutu@gmail.com>

crates/ecstore/src/bucket/replication/mod.rs

@@ -80,6 +80,6 @@ pub use replication_queue_boundary::{
 pub use replication_resync_boundary::{BucketReplicationResyncStatus, ResyncOpts, TargetReplicationResyncStatus};
 pub use replication_scanner_bridge::ReplicationScannerBridge;
 pub use replication_state::{ReplicationStats, RuntimeReplicationTargetBacklog};
-pub use replication_stats_boundary::BucketStats;
+pub use replication_stats_boundary::{BucketReplicationStats, BucketStats};
 pub use replication_storage_boundary::{ReplicationObjectIO, ReplicationStorage};
 pub(crate) use replication_target_config_bridge::ReplicationTargetConfigBridge;

crates/ecstore/src/bucket/replication/replication_stats_boundary.rs

@@ -12,10 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-pub use rustfs_replication::BucketStats;
 #[cfg(test)]
 pub(crate) use rustfs_replication::FailStats;
 pub(crate) use rustfs_replication::{
-    ActiveWorkerStat, BucketReplicationStat, BucketReplicationStats, InQueueMetric, ProxyMetric, ProxyStatsCache, QueueCache,
-    ReplicationMetricScope, SRMetricsSummary, XferStats,
+    ActiveWorkerStat, BucketReplicationStat, InQueueMetric, ProxyMetric, ProxyStatsCache, QueueCache, ReplicationMetricScope,
+    SRMetricsSummary, XferStats,
 };
+pub use rustfs_replication::{BucketReplicationStats, BucketStats};