Intake - Pre-Booked Visits - Patients Able to Book Same Slot if Prebook Screen Opened Simultaneously*

[DenysMyrosh]

Tested on:
Env: development
Hash: afa762e
Version: 0.17.0

Description:
When multiple patients access the Prebook screen simultaneously, they can book the same time slot without validation. If one patient books a slot, other patients who attempt to book the same slot afterward should see an error message to prevent multiple bookings for the same time.

1st visit https://ehr.ottehr.com/visit/3fc9799d-ddb5-487b-b85a-3f434329b6cc
2nd visit https://ehr.ottehr.com/visit/58cfa2c9-715a-4674-9b2d-df43bdd3fb48

Steps to Reproduce:

1. Patient A and Patient B open the Prebook screen at the same time.
2. Both patients see the available time slot "10:00 AM" for the selected location.
3. Patient A selects the 10:00 AM slot and successfully requests the visit.
4. Patient B selects the same 10:00 AM slot and also successfully requests the visit without an error message.

Expected Result:
When Patient B tries to book the already selected time slot (10:00 AM), an error message should be displayed, preventing duplicate bookings for the same slot.

Actual Result:
Both Patient A and Patient B can successfully book the same time slot (10:00 AM).