Refactor public addresses field in Person

[Airiinnn]

The Person class currently utilizes a field defined as Map<Network, Set<PublicAddress>> to store public addresses. This implementation presents a significant risk of contamination, where the key representing a specific network (e.g., "BTC") may inadvertently allow values of a different network type (e.g., EthAddress). Since the type PublicAddress does not enforce type safety, this can lead to data integrity issues and make it challenging to manage the addresses appropriately.

Proposed solutions:

1. Refactor the data structure (preferred)
2. Add checks and tests to ensure this does not happen