feat: disable span description clustering (#76383)

We're making a lot of redis calls here
https://sentry.my.sentry.io/organizations/sentry/performance/trace/2f1fea0659264706bc0f2b4d6807908f/?dataset=transactions&field=title&field=project&field=timestamp&field=transaction.duration&name=All+Errors&node=span-9f7db12a2da2ae00&node=txn-09cd48a7d61d4b8db3cfeb07e4c202a9&query=server_name%3Agetsentry-worker-postprocess-transactions%2A&queryDataset=transaction-like&sort=-transaction.duration&source=discover&statsPeriod=24h&timestamp=1724066865&yAxis=count%28%29
might be hitting resource limits on redis instance

src/sentry/features/temporary.py

@@ -546,6 +546,7 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("projects:relay-otel-endpoint", ProjectFeature, FeatureHandlerStrategy.OPTIONS, api_expose=False)
     # EAP: extremely experimental flag that makes DDM page use EAP tables
     manager.add("projects:use-eap-spans-for-metrics-explorer", ProjectFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
+    manager.add("projects:record-span-descriptions", ProjectFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
 
     # Project plugin features
     manager.add("projects:plugins", ProjectPluginFeature, FeatureHandlerStrategy.INTERNAL, default=True, api_expose=True)

src/sentry/ingest/transaction_clusterer/datasource/redis.py

@@ -1,4 +1,5 @@
 """ Write transactions into redis sets """
+
 import logging
 from collections.abc import Iterator, Mapping
 from typing import Any
@@ -184,6 +185,9 @@ def record_span_descriptions(
     if not features.has("projects:span-metrics-extraction", project):
         return
 
+    if not features.has("projects:record-span-descriptions", project):
+        return
+
     spans = event_data.get("spans", [])
     for span in spans:
         description = _get_span_description_to_store(span)

tests/sentry/ingest/test_span_desc_clusterer.py

@@ -83,6 +83,7 @@ def test_record_span_desc_url(mocked_record, default_organization):
     with Feature(
         {
             "projects:span-metrics-extraction": True,
+            "projects:record-span-descriptions": True,
         }
     ):
         project = Project(id=111, name="project", organization_id=default_organization.id)
@@ -241,9 +242,10 @@ def _add_mock_data(proj, number):
         # Add a transaction to project2 so it runs again
         _record_sample(ClustererNamespace.SPANS, project2, "foo")
 
-        with mock.patch(
-            "sentry.ingest.transaction_clusterer.tasks.PROJECTS_PER_TASK", 1
-        ), freeze_time("2000-01-01 01:00:01"):
+        with (
+            mock.patch("sentry.ingest.transaction_clusterer.tasks.PROJECTS_PER_TASK", 1),
+            freeze_time("2000-01-01 01:00:01"),
+        ):
             spawn_clusterers_span_descs()
 
         # One project per batch now:
@@ -299,8 +301,9 @@ def test_get_deleted_project():
 @django_db_all
 def test_record_span_descriptions_no_databag(default_organization):
     """Verify a `None` databag doesn't break the span description clusterer."""
-    with Feature("projects:span-metrics-extraction"), override_options(
-        {"span_descs.bump-lifetime-sample-rate": 1.0}
+    with (
+        Feature("projects:span-metrics-extraction"),
+        override_options({"span_descs.bump-lifetime-sample-rate": 1.0}),
     ):
         payload = {
             "spans": [