feat(obs): unify metrics initialization and fix exporter move error (#851)

* feat(obs): unify metrics initialization and fix exporter move error

- Fix Rust E0382 (use after move) by removing duplicate MetricExporter consumption.
- Consolidate MeterProvider construction into single Recorder builder path.
- Remove redundant Recorder::builder(...).install_global() call.
- Ensure PeriodicReader setup is performed only once (HTTP + optional stdout).
- Set global meter provider and metrics recorder exactly once.
- Preserve existing behavior for stdout/file vs HTTP modes.
- Minor cleanup: consistent resource reuse and interval handling.

* update telemetry.rs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix

* fix

* fix

* fix: modify logger level from error to event

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

crates/notify/src/integration.rs

@@ -140,7 +140,7 @@ impl NotificationSystem {
             info!("Initializing target: {}", target.id());
             // Initialize the target
             if let Err(e) = target.init().await {
-                error!("Target {} Initialization failed:{}", target.id(), e);
+                warn!("Target {} Initialization failed:{}", target.id(), e);
                 continue;
             }
             debug!("Target {} initialized successfully,enabled:{}", target_id, target.is_enabled());
@@ -422,7 +422,7 @@ impl NotificationSystem {
             if !e.to_string().contains("ARN not found") {
                 return Err(NotificationError::BucketNotification(e.to_string()));
             } else {
-                error!("{}", e);
+                error!("config validate failed, err: {}", e);
             }
         }