Fix operations CI and snapshots

backend/Controllers/OperationsController.cs

@@ -1,3 +1,4 @@
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Nexus.Api.Services;
 
@@ -8,6 +9,7 @@ namespace Nexus.Api.Controllers;
 public class OperationsController(IOperationsService operationsService) : ControllerBase
 {
     [HttpGet("snapshot")]
+    [Authorize]
     public async Task<IResult> GetSnapshot(CancellationToken ct)
         => Results.Ok(await operationsService.GetSnapshotAsync(ct));
 }