- Introduced a new field `lastNobilityAdvanceAt` in the FalukantUser model to track the last time a user advanced in nobility.
- Updated the `FalukantService` to enforce a one-week cooldown between nobility advancements, throwing an error if the user attempts to advance too soon.
- Ensured the `lastNobilityAdvanceAt` field is updated with the current date upon a successful nobility advancement.
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