perf(similarity): in backfill lower time bounds (#73345)

lower time bounds to 1 minute, as we'll scan less data, and i think this
should be plenty of range for it to find the last event sent.

Author: JoshFerge

src/sentry/tasks/embeddings_grouping/utils.py

@@ -215,12 +215,12 @@ def get_data_from_snuba(project, groups_to_backfill_with_no_embedding):
                     Condition(
                         Column("timestamp", entity=events_entity),
                         Op.GTE,
-                        group.last_seen - timedelta(minutes=5),
+                        group.last_seen - timedelta(minutes=1),
                     ),
                     Condition(
                         Column("timestamp", entity=events_entity),
                         Op.LT,
-                        group.last_seen + timedelta(minutes=5),
+                        group.last_seen + timedelta(minutes=1),
                     ),
                 ],
                 limit=Limit(1),