Missing OSM timestamp in file header

[aoles]

Processed files are missing header metadata field osmosis_replication_timestamp from which ORS derives the OSM data snapshot date.

original

$ osmium fileinfo niue.pbf
File:
  Name: niue.pbf
  Format: PBF
  Compression: none
  Size: 414398
Header:
  Bounding boxes:
    (-172.027,-22.47347,-166.2989,-16.6366699)
  With history: no
  Options:
    generator=osmium/1.14.0
    osmosis_replication_base_url=https://download.geofabrik.de/australia-oceania/niue-updates
    osmosis_replication_sequence_number=1938
    osmosis_replication_timestamp=2025-07-24T20:21:00Z
    pbf_dense_nodes=true
    pbf_optional_feature_0=Sort.Type_then_ID
    sorting=Type_then_ID
    timestamp=2025-07-24T20:21:00Z

processed

$ osmium fileinfo processed_niue.pbf
File:
  Name: processed_niue.pbf
  Format: PBF
  Compression: none
  Size: 83711
Header:
  Bounding boxes:
  With history: no
  Options:
    generator=osm-transform_v0.3.2
    pbf_dense_nodes=true
    pbf_optional_feature_0=Sort.Type_then_ID
    sorting=Type_then_ID