Add instance_name label to snapshot_export_timer_seconds (#33829)

Include instance_name in snapshot_export_timer_seconds metric. Verified format and lint checks.

Link to Devin run: https://app.devin.ai/sessions/ec35d799635b4bd2aacbfc731db4f84e

GitOrigin-RevId: 90048458ccdbd35adc43c7717176f1397dfdf9ed

Author: devin-ai-integration[bot]

crates/application/src/exports/metrics.rs

@@ -1,14 +1,19 @@
 use metrics::{
     register_convex_histogram,
+    StaticMetricLabel,
     StatusTimer,
-    STATUS_LABEL,
 };
 
 register_convex_histogram!(
     SNAPSHOT_EXPORT_TIMER_SECONDS,
     "Time taken for a snapshot export",
-    &STATUS_LABEL
+    &["instance_name", "status"]
 );
-pub fn export_timer() -> StatusTimer {
-    StatusTimer::new(&SNAPSHOT_EXPORT_TIMER_SECONDS)
+pub fn export_timer(instance_name: &str) -> StatusTimer {
+    let mut timer = StatusTimer::new(&SNAPSHOT_EXPORT_TIMER_SECONDS);
+    timer.add_label(StaticMetricLabel::new(
+        "instance_name",
+        instance_name.to_owned(),
+    ));
+    timer
 }

crates/application/src/exports/worker.rs

@@ -131,7 +131,7 @@ impl<RT: Runtime> ExportWorker<RT> {
             (Some(export), None) => {
                 tracing::info!("Export requested.");
                 let _status = log_worker_starting("ExportWorker");
-                let timer = export_timer();
+                let timer = export_timer(&self.instance_name);
                 let ts = self.database.now_ts_for_reads();
                 let in_progress_export = (*export).clone().in_progress(*ts)?;
                 let in_progress_export_doc = SystemMetadataModel::new_global(&mut tx)
@@ -151,7 +151,7 @@ impl<RT: Runtime> ExportWorker<RT> {
             (None, Some(export)) => {
                 tracing::info!("In progress export restarting...");
                 let _status = log_worker_starting("ExportWorker");
-                let timer = export_timer();
+                let timer = export_timer(&self.instance_name);
                 self.export(export).await?;
                 timer.finish();
                 return Ok(());