What does this PR do?

Fixes an issue in the local seeding process where the region ID was not being properly retrieved after upserting a region. The upsert operation is a no-op when a region with the same name and platform already exists, which means the original ID is preserved. This change adds a query to fetch the actual region ID after the upsert operation to ensure the correct ID is used when creating regional settings.

Fixes # (issue)

If there is not an issue for this, please create one first. This is used to tracking purposes and also helps us understand why this PR exists

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Chore (refactoring code, technical debt, workflow improvements)
• Enhancement (small improvements)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How should this be tested?

• Run the local seeding command multiple times to ensure it works correctly on both initial runs and subsequent runs
• Verify that regional settings are created with the correct region ID
• Test that deployments work properly after seeding

Checklist

Required

• Filled out the "How to test" section in this PR
• Read Contributing Guide
• Self-reviewed my own code
• Commented on my code in hard-to-understand areas
• Ran pnpm build
• Ran pnpm fmt
• Ran make fmt on /go directory
• Checked for warnings, there are none
• Removed all console.logs
• Merged the latest changes from main onto my branch with git pull origin main
• My changes don't cause any responsiveness issues

Appreciated

• If a UI change was made: Added a screen recording or screenshots to this PR
• Updated the Unkey Docs if changes were necessary