Availability settings are very slow to load on production

Describe the bug
The Availability panel the availability settings are very slow to load the first time or after a browser page refresh.

To Reproduce

• Sign into Appointment production
• After the dashboard appears, click the Availability tab at the top
• Watch the You're bookable toggle and other page settings

Expected behavior
Expect the availability settings to load immediately and the controls/fields to be set appropriately.

Actual behavior
It takes at least a few seconds for the availability settings to be loaded and the controls/fields updated on the page. For example, the You're bookable toggle is very noticeably slow to be set to the on position.

System (please complete the following information):
MacBook M3 Pro Tahoe 26.1. Happens on Firefox, Chrome, and Safari.

Additional context
I see this on Firefox, Chrome, and Safari so it's not browser-specific. Also happens if you are on the Availability page and you just do a browser page refresh, you'll see the slow loading. Brought to my attention by the E2E tests fail intermittently in production.