feat: bind each node to the binary it runs at its first handshake; refuse changes that are not in a CI-signed manifest [CI]

backend/tests/MoShiro.Backend.Tests/ReleaseOfferTests.cs

@@ -3,6 +3,7 @@ using System.Security.Cryptography;
 using System.Text;
 using System.Text.Json.Nodes;
 using MoShiro.Backend.Api;
+using MoShiro.Backend.Application;
 
 namespace MoShiro.Backend.Tests;