Manual updating sources doesn't work (or just keep cached version)

[kam193]

Describe the bug
Since the last changes to source updates, it looks like manual triggering an update doesn't work any more. I suspect it just keeps the cached version, what I wouldn't expect when manually triggering an update. I don't have any logs to confirm my suspicion at the moment.

To Reproduce
Steps to reproduce the behavior:

1. Have a source (e.g. YARA rules) that you control and that has been updated in AL some time ago.
2. Change something in the source.
3. Wait a few minutes to ensure no caching happens in between.
4. Go to the update sources page and manually trigger updating your selected source.
5. Observe quick "Skipped" result. You can also find signatures and confirm there was nothing updated.

To confirm that there was something to update, you can change something in the source configuration. Then you will see that it updates.

Expected behavior
When manually triggering an update, I would expect to ignore any cache.

Screenshots

Environment (please complete the following information if pertinent):

• Assemblyline Version: 4.5.0.67
• I've observed the same behaviour in newest YARA as well as custom services.

Additional context