Tracking character movement

microservices/LocationsApi/Models/Location.cs

@@ -15,6 +15,9 @@ public class Location
     [BsonElement("coord")]
     public required Coord Coord { get; set; }
 
+    [BsonElement("characterIds")]
+    public List<string> CharacterIds { get; set; } = new();
+
     [BsonElement("createdUtc")]
     public DateTime CreatedUtc { get; set; } = DateTime.UtcNow;
 }

microservices/LocationsApi/Models/UpdateLocationPresenceRequest.cs

@@ -0,0 +1,8 @@
+namespace LocationsApi.Models;
+
+public class UpdateLocationPresenceRequest
+{
+    public string CharacterId { get; set; } = string.Empty;
+
+    public Coord? Coord { get; set; }
+}