Add DAO function and endpoint for archiving email reply_to addresses

Added a new DAO function which archives email reply_to addresses by
setting archived to True. This raises a new type of error, an
ArchiveValidationError, if trying to archive a default reply_to address.

Added a new endpoint for archiving email reply_to addresses.

app/dao/service_email_reply_to_dao.py

@@ -3,6 +3,7 @@ from sqlalchemy import desc
 from app import db
 from app.dao.dao_utils import transactional
 from app.errors import InvalidRequest
+from app.exceptions import ArchiveValidationError
 from app.models import ServiceEmailReplyTo
 
 
@@ -56,6 +57,22 @@ def update_reply_to_email_address(service_id, reply_to_id, email_address, is_def
     return reply_to_update
 
 
+@transactional
+def archive_reply_to_email_address(service_id, reply_to_id):
+    reply_to_archive = ServiceEmailReplyTo.query.filter_by(
+        id=reply_to_id,
+        service_id=service_id
+    ).one()
+
+    if reply_to_archive.is_default:
+        raise ArchiveValidationError("You cannot delete a default email reply to address")
+
+    reply_to_archive.archived = True
+
+    db.session.add(reply_to_archive)
+    return reply_to_archive
+
+
 def _get_existing_default(service_id):
     existing_reply_to = dao_get_reply_to_by_service_id(service_id=service_id)
     if existing_reply_to: