Pass read offset in the PartitionStatus response (#24748)

Author: ubyte

.github/last_commit.txt

@@ -1 +1 @@
-110937321b45fb3be9ca39ff3bb83bcdfcf52c97
+2e6b589fa47b74662114ecad23c188f935c4b556

src/api/protos/ydb_topic.proto

@@ -475,6 +475,9 @@ message StreamReadMessage {
 
         // Write timestamp of next message written to this partition will be no less than write_time_high_watermark.
         google.protobuf.Timestamp write_time_high_watermark = 4;
+
+        // Messages with offsets up to and including (read_offset - 1) was read.
+        int64 read_offset = 5;
     }
 
     // Command from server to create and start a partition session.

src/client/topic/impl/read_session_impl.ipp

@@ -1701,7 +1701,7 @@ inline void TSingleClusterReadSessionImpl<false>::OnReadDoneImpl(
     bool pushRes = EventsQueue->PushEvent(partitionStreamIt->second,
                             TReadSessionEvent::TPartitionSessionStatusEvent(
                                 partitionStreamIt->second, msg.committed_offset(),
-                                0, // TODO: support read offset in status
+                                msg.read_offset(),
                                 msg.partition_offsets().end(),
                                 TInstant::MilliSeconds(::google::protobuf::util::TimeUtil::TimestampToMilliseconds(
                                     msg.write_time_high_watermark()))),