feat: add metrics to clean message and workflow-run task (#33143)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: hj24 <mambahj24@gmail.com>

api/extensions/otel/runtime.py

@@ -5,7 +5,7 @@ from typing import Union
 
 from celery.signals import worker_init
 from flask_login import user_loaded_from_request, user_logged_in
-from opentelemetry import trace
+from opentelemetry import metrics, trace
 from opentelemetry.propagate import set_global_textmap
 from opentelemetry.propagators.b3 import B3MultiFormat
 from opentelemetry.propagators.composite import CompositePropagator
@@ -31,9 +31,29 @@ def setup_context_propagation() -> None:
 
 
 def shutdown_tracer() -> None:
+    flush_telemetry()
+
+
+def flush_telemetry() -> None:
+    """
+    Best-effort flush for telemetry providers.
+
+    This is mainly used by short-lived command processes (e.g. Kubernetes CronJob)
+    so counters/histograms are exported before the process exits.
+    """
     provider = trace.get_tracer_provider()
     if hasattr(provider, "force_flush"):
-        provider.force_flush()
+        try:
+            provider.force_flush()
+        except Exception:
+            logger.exception("otel: failed to flush trace provider")
+
+    metric_provider = metrics.get_meter_provider()
+    if hasattr(metric_provider, "force_flush"):
+        try:
+            metric_provider.force_flush()
+        except Exception:
+            logger.exception("otel: failed to flush metric provider")
 
 
 def is_celery_worker():