Precompile ULID regex

[evdokimovn]

Compile ULID regex just once

Description

It is safe to reuse regexp object so there should be no need to compile it on every call

References

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[linux-foundation-easycla]

• ❌ - login: @evdokimovn / name: Nikita Evdokimov . The commit (8246c7e) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.