feat: update controls in the admin, release token scope, build info in CI images [CI]

The versions page shows each node's update state with update buttons, API
tokens get a release scope that can only register releases (used by CI), and
the CI image and release builds now pass the tag, commit and build time.

backend/src/Monitor.Backend.Api/ApiModule.cs

@@ -103,6 +103,8 @@ public static class ApiModule
         RouteGroupBuilder admin = app.MapGroup("/api/admin");
         AuthEndpoints.MapLogin(admin);
 
+        BuildEndpoints.MapPublish(admin.MapGroup(string.Empty).AddEndpointFilter(ReleaseGuard.InvokeAsync));
+
         RouteGroupBuilder guarded = admin.MapGroup(string.Empty).AddEndpointFilter(AdminGuard.InvokeAsync);
         AuthEndpoints.MapSession(guarded);
         AgentEndpoints.Map(guarded);