supabase / supabase / 30257085470

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fix: make high availability in project creation form public (#48338)

Move "High availability" from internal-only to public. Closes MUL-668.

## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?

Bug fix

## What is the current behavior?

"High availability" is an internal-only config

<img width="724" height="1126" alt="Screenshot 2026-07-26 at 8 15 57 PM"
src="https://github.com/user-attachments/assets/83e1856b-9020-4b65-a019-27e3cc29bae9"
/>

## What is the new behavior?

"High availability" is a public user-facing config

<img width="724" height="1036" alt="Screenshot 2026-07-26 at 8 15 31 PM"
src="https://github.com/user-attachments/assets/4f369058-ce91-4bcf-bd3c-120277363b1a"
/>

Still hidden without the org entitlement, i.e. currently not available
anywhere on prod

<img width="724" height="931" alt="Screenshot 2026-07-26 at 8 18 58 PM"
src="https://github.com/user-attachments/assets/3e1deb76-210c-416b-b716-45ff6e3b0afd"
/>



<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added a High availability option directly to the project creation
form.
* The option is shown when available for the account and hidden when
unavailable.
* Enabling High availability automatically selects AWS as the cloud
provider.

* **Bug Fixes**
* Corrected validation for incompatible High availability and OrioleDB
selections.

* **Tests**
* Added coverage for High availability visibility, eligibility, and form
submission behavior.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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