(not sure if the MBS project would be more fitting for this issue)

The place coordinates in the search response are treated as string:

$ curl -sL "https://musicbrainz.org/ws/2/place/?query=place:%22royal%20albert%20hall%22%20AND%20address:london&fmt=json" | jq ".places[].coordinates"
{
  "latitude": "51.50105",
  "longitude": "-0.17748"
}

whereas they are treated as float when accessing them through a fetch query:

$ curl -sL "https://musicbrainz.org/ws/2/place/4352063b-a833-421b-a420-e7fb295dece0?fmt=json" | jq ".coordinates"
{
  "latitude": 51.50105,
  "longitude": -0.17748
}

IMO they should be treated as float when accessing them through a search query too since it seems more fitting and will help maintain consistency between both the search and fetch endpoints.