refresh

Refreshes the local database with data fetched from the remote API.

This function performs the following steps:

1. Fetches all items from the local database.

2. Fetches all items from the remote API.

3. Compares the local and remote items:

• If an item is present in the local database but not in the remote, it is deleted from the local database.

• If an item is present in the remote but not in the local database, it is added to the local database.

• If an item is present in both the local database and the remote, the local item is updated with the data from the remote.

Throws