feat: improve agent management and speed up tests

backend/src/Monitor.Backend.Api/Admin/AgentEndpoints.cs

@@ -43,7 +43,7 @@ public static class AgentEndpoints
             .Api("join_tokens_create", "Create a join token; the plaintext is returned only once", TokensTag)
             .Returns<CreatedJoinTokenDto>(StatusCodes.Status201Created).ProducesProblems(400, 401, 403);
         group.MapDelete("/join-tokens/{id}", RevokeTokenAsync)
-            .Api("join_tokens_revoke", "Revoke a join token", TokensTag)
+            .Api("join_tokens_revoke", "Revoke a join token; with purge=true delete the record for good", TokensTag)
             .Returns<object>(StatusCodes.Status204NoContent).ProducesProblems(401, 403);
 
         group.MapGet("/probes", ListProbesAsync)
@@ -130,12 +130,20 @@ public static class AgentEndpoints
 
         http.Response.Headers.CacheControl = "no-store";
         http.Response.Headers.Location = "/api/admin/join-tokens";
-        return TypedResults.Json(new CreatedJoinTokenDto(Mappers.ToDto(created.Info), created.Plaintext, created.InstallCommand), ApiJsonContext.Default.CreatedJoinTokenDto, statusCode: StatusCodes.Status201Created);
+        return TypedResults.Json(new CreatedJoinTokenDto(Mappers.ToDto(created.Info), created.Plaintext, new InstallCommandsDto(created.InstallCommands.Linux, created.InstallCommands.Macos, created.InstallCommands.Windows)), ApiJsonContext.Default.CreatedJoinTokenDto, statusCode: StatusCodes.Status201Created);
     }
 
-    private static async Task<IResult> RevokeTokenAsync(JoinTokenService tokens, string id, CancellationToken ct)
+    private static async Task<IResult> RevokeTokenAsync(JoinTokenService tokens, string id, bool? purge, CancellationToken ct)
     {
-        await tokens.RevokeAsync(id, ct);
+        if (purge == true)
+        {
+            await tokens.DeleteAsync(id, ct);
+        }
+        else
+        {
+            await tokens.RevokeAsync(id, ct);
+        }
+
         return TypedResults.NoContent();
     }