chore: Bump timestamp bounds in batch exports (#21717)

posthog/temporal/batch_exports/batch_exports.py

@@ -51,7 +51,7 @@
 -- These 'timestamp' checks are a heuristic to exploit the sort key.
 -- Ideally, we need a schema that serves our needs, i.e. with a sort key on the _timestamp field used for batch exports.
 -- As a side-effect, this heuristic will discard historical loads older than a day.
-AND timestamp >= toDateTime64({data_interval_start}, 6, 'UTC') - INTERVAL 2 DAY
+AND timestamp >= toDateTime64({data_interval_start}, 6, 'UTC') - INTERVAL 4 DAY
 AND timestamp < toDateTime64({data_interval_end}, 6, 'UTC') + INTERVAL 1 DAY
 """