Create /review/approve-source endpoint

[maxachis]

Approve a source through the source identification API.

If submitted as approved:

1. The source is marked as approved and the user's ID is stored and associated with the url in a approving_user_url table

If submitted as not relevant, aka rejected:

1. The source is confirmed as rejected in the Source Collector Database

After a source is submitted through this endpoint, whether as approved or rejected, it can no longer be annotated by either the auto-labeler or by users, nor can it be submitted again.

Endpoint parameters

All of the below will be required:

• url_id: The source collector URL id.
• record_type: The record type to be given in the /data-sources endpoint
• agency_id: The agency id to associate with the data type. Single agency ID assumed.

Internal logic

• This will require the addition of a new approved enum value for the url_status enum
• This will require the addition of a new approving_user_url table
• If an agency is not confirmed, it will need to be confirmed
• Metadata values (record_type, relevant) will need to be set as confirmed.

Additional Notes

This will not submit a source right away to Data Sources API. That task will be handled by #152