[BUG] Timeout getting persona updates can lead to a dead service

[NeonDaniel]

Description

If a persona update request fails, then the service appears to break

Steps to Reproduce

• Observe a persona update failure

Relevant Code

https://github.com/NeonGeckoCom/neon-llm-core/blob/08dc9ca8fade0bbf33cb46a990435bbc9f438137/neon_llm_core/utils/personas/provider.py#L117C13-L127

Other Notes

There should be some error handling around this method to possibly retry the request, or else explicitly fall back to current configuration