[FEAT] Event-driven persona updates

[NeonDaniel]

Objective

Rather than periodic synchronization (or maybe in addition), could PersonasPrivoder handle update events emitted by whatever service is defining new personas?

Initial Implementation Requirements

• Handler for persona updates
• Updated method for manual and/or periodic synchronization with the database

Other Considerations

With more focus on BrainForge LLMs, a larger portion of the LLMs will have a static list of personas defined for that specific LLM, rather than a mutable list of user-defined personas.

[NeonKirill]

@NeonDaniel sounds good to me, the only edge case issue I may think of is to make sure we acquire the up-to-date list of personas on the startup, so I would suggest to keep initial + polling synchronization, and add the proposed event-driven update. We may set this polling interval high enough so it wont affect performance but will ensure system stability