Updates journal entry creation to store entry line metadata as a JSON string in the database.
Updates entry line retrieval to parse the JSON string back into a metadata object.
This change allows storing more complex data structures in the metadata field.
Removes the `castle.` prefix from database table names in queries, streamlining data access.
Updates authentication to use `WalletTypeInfo` dependency injection for retrieving wallet information. This improves security and aligns with LNBits' authentication patterns. Also modifies the main router's tag to uppercase.
