payloadLifespan/payloadLifetime and other name variants unified to Time To Live naming.

code/MessengerApi.Db.Contracts/Entities/Message.cs

@@ -20,6 +20,6 @@ namespace MessengerApi.Db.Entities
 
         public string Payload { get; set; }
 
-        public int? PayloadLifespanInSeconds { get; set; }
+        public int? TimeToLiveInSeconds { get; set; }
     }
 }

code/MessengerApi.Db.Contracts/MessengerApi.Db.Contracts.csproj

@@ -4,6 +4,7 @@
     <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>disable</Nullable>
+	<ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
 
 </Project>