No notifications received for new questions with followed tags

## Describe the bug

When following tags, users do not receive notifications for new questions tagged with those tags. Notifications for other events, like answers to the user’s questions, work correctly. This feature appears to be unimplemented or broken.

### To Reproduce

Steps to reproduce the behavior:

1. Log in to your Apache Answer account.

2. Follow one or more tags (e.g., python).

3. Ensure that notifications for followed tags are enabled in your notification settings.

4. Wait for a new question to be posted with the followed tag(s).

5. Observe that no notification is received about the new question.

6. (Optional) Verify that you do receive notifications for other events, like answers to your own questions.

### Expected behavior

When a user follows one or more tags and enables notifications for them, the user should receive timely notifications whenever a new question is posted with any of those followed tags.

### Platform

- Device: Desktop
- Browser and version: Chrome(Version 138.0.7204.184), Firefox

The issue names no files, tests, or entry points. Start by tracing how notifications for followed tags are handled and compare that path with notifications for answers to a user's questions; done means users with followed tags and enabled notifications receive alerts for newly posted matching questions.

Written by the indexing model from the issue text.