Error calling sync triggers (BadRequest)

This was previously discussed in #1457.

I'm trying to update a function app to .NET 8.0. To test this I'm deploying a new instance of the function app.

My deployment is failing as follows:

```
Azure.Functions.Cli.Common.CliException: Error calling sync triggers (BadRequest). Request ID = '706bb4a9-9523-4e14-9cda-ba84fe140e33'.
at Azure.Functions.Cli.Helpers.RetryHelper.Retry(Func`1 func, Int32 retryCount, TimeSpan retryDelay, Boolean displayError) in D:\a\_work\1\s\src\Azure.Functions.Cli\Helpers\RetryHelper.cs:line 27
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.SyncTriggers(Site functionApp) in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 529
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.PublishFunctionApp(Site functionApp, GitIgnoreParser ignoreParser, IDictionary`2 additionalAppSettings) in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 513
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.RunAsync() in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 213
at Azure.Functions.Cli.ConsoleApp.RunAsync[T](String[] args, IContainer container) in D:\a\_work\1\s\src\Azure.Functions.Cli\ConsoleApp.cs:line 64
WARNING:deploy:function failed to deploy, waiting 60 seconds and trying again
Azure.Functions.Cli.Common.CliException: Error calling sync triggers (BadRequest). Request ID = '1dfbbbab-5f78-40ea-be05-dd5cfd230faf'.
at Azure.Functions.Cli.Helpers.RetryHelper.Retry(Func`1 func, Int32 retryCount, TimeSpan retryDelay, Boolean displayError) in D:\a\_work\1\s\src\Azure.Functions.Cli\Helpers\RetryHelper.cs:line 27
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.SyncTriggers(Site functionApp) in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 529
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.PublishFunctionApp(Site functionApp, GitIgnoreParser ignoreParser, IDictionary`2 additionalAppSettings) in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 513
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.RunAsync() in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 213
at Azure.Functions.Cli.ConsoleApp.RunAsync[T](String[] args, IContainer container) in D:\a\_work\1\s\src\Azure.Functions.Cli\ConsoleApp.cs:line 64
WARNING:deploy:function failed to deploy, waiting 60 seconds and trying again
Azure.Functions.Cli.Common.CliException: Error calling sync triggers (BadRequest). Request ID = 'e94690f7-c90d-4cbe-bb20-23436fcc5351'.
at Azure.Functions.Cli.Helpers.RetryHelper.Retry(Func`1 func, Int32 retryCount, TimeSpan retryDelay, Boolean displayError) in D:\a\_work\1\s\src\Azure.Functions.Cli\Helpers\RetryHelper.cs:line 27
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.SyncTriggers(Site functionApp) in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 529
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.PublishFunctionApp(Site functionApp, GitIgnoreParser ignoreParser, IDictionary`2 additionalAppSettings) in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 513
at Azure.Functions.Cli.Actions.AzureActions.PublishFunctionAppAction.RunAsync() in D:\a\_work\1\s\src\Azure.Functions.Cli\Actions\AzureActions\PublishFunctionAppAction.cs:line 213
at Azure.Functions.Cli.ConsoleApp.RunAsync[T](String[] args, IContainer container) in D:\a\_work\1\s\src\Azure.Functions.Cli\ConsoleApp.cs:line 64
```

I'm running with `--verbose` and `CLI_DEBUG=1` but that’s all the information I get. Those are the real request IDs so you should be able to pull diagnostic information and see my deployment name etc.

In the Azure portal, I can see the function app and it seems to be running (live logs shows it grabbing the blob lease). There are no requests showing up in Application Insights.

Start by comparing this report with issue #1457, then inspect SyncTriggers in src/Azure.Functions.Cli/Actions/AzureActions/PublishFunctionAppAction.cs at line 529 and the retry path in Helpers/RetryHelper.cs. Reproduce the .NET 8 deployment if possible and use the reported request IDs to investigate the BadRequest. Done means identifying the sync-trigger failure and providing a verified fix or actionable diagnostic output.

Written by the indexing model from the issue text.