kafka: add TODO marker for ListOffsets earliest-path fix handoff

Pinpoints where the follow-up PR should wire the
correct_epoch_enabled + is_rr gate once partition_proxy exposes a
term-for-offset lookup. References the underlying data sources for
local and tiered-storage read paths. No behavior change.

Author: nguyen-andrew

src/v/kafka/server/handlers/list_offsets.cc

@@ -121,6 +121,12 @@ static ss::future<list_offset_partition_response> list_offsets_partition(
               ktp.get_partition(), maybe_start_ofs.error());
         }
 
+        // TODO(CORE-12505 follow-up): wire the correct_epoch_enabled
+        // + is_rr gate here once partition_proxy exposes a
+        // term-for-offset lookup. When the property is true and the
+        // topic is not a read replica, this should return the
+        // historical term for maybe_start_ofs.value() instead of the
+        // current leader term.
         co_return list_offsets_response::make_partition(
           ktp.get_partition(),
           model::timestamp(-1),