Add Redpanda Migrator offset metadata

- New `redpanda_migrator_offsets` input.
- Field `kafka_offset_metadata` added to the `redpanda_migrator_offsets` output.

Signed-off-by: Mihai Todor <todormihai@gmail.com>

CHANGELOG.md

@@ -7,9 +7,11 @@ All notable changes to this project will be documented in this file.
 
 ### Added
 
-- New `pg_stream` input supporting change data capture (CDC) from PostgreSQL (@le-vlad)
+- New `pg_stream` input supporting change data capture (CDC) from PostgreSQL. (@le-vlad)
 - Field `metadata_max_age` added to the `redpanda_migrator_offsets` output. (@mihaitodor)
 - Field `kafka_timestamp_ms` added to the `kafka`, `kafka_franz`, `redpanda`, `redpanda_common` and `redpanda_migrator` outputs. (@mihaitodor)
+- New `redpanda_migrator_offsets` input. (@mihaitodor)
+- Field `kafka_offset_metadata` added to the `redpanda_migrator_offsets` output. (@mihaitodor)
 
 ### Changed