[Messages] The service provider cannot read messages from the parent after the workshop has been deleted

[Shliakhtych]

Environment: Windows 11, 64-bit, Google Chrome v.127.0.6533.90.
Reproducible: always.

Build found: 2d7573d

Preconditions

1. Go to https://oos.dmytrominochkin.cloud/;
2. The service provider must have at least one workshop created.

Steps to reproduce

1. Log in as a parent;
2. Find the service provider's workshop and send a message;
3. Log in as the service provider and do not read the messages;
4. Go to the "My Workshops" page and delete the selected workshop;
5. Go to the "Messages" page;
6. Open the unread message related to the deleted workshop;
7. Note the result.

Actual result
The message remains unread because the message history is not loading.

Expected result
When opening the message history, the service provider or parent sees both the message history and the notification
"Гурток видалено
Зверніть увагу, що ви не можете надсилати і отримувати повідомлення, оскільки гурток було видалено."

Labels to be added
"Bug", Priority ("Priority: High"), Severity ("Severity: Critical"), Type ("UI").