fix: classify CONFLICT error type

[seer-by-sentry]

What does this PR do?

This PR addresses an issue where TRPCError with a CONFLICT code was being reported as unhandled in Sentry. The problem stemmed from the CONFLICT code being omitted from Sentry's EXPECTED_TRPC_CODES list.

To fix this:

• 'CONFLICT' has been added to the list of recognized error codes.
• 'warn' severity has been assigned to 'CONFLICT' errors.

This change allows for better handling and classification of duplicate resource errors, such as when a workspace slug already exists.

This fix was generated by Seer in Sentry, triggered by James Perkins. 👁️ Run ID: 12156729
Not quite right? Click here to continue debugging with Seer.

Fixes UNKEY-DASHBOARD-32

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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?

• Test A
• Test B

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

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Project	Deployment	Actions	Updated (UTC)
dashboard	Ready	Preview, Comment	Mar 22, 2026 4:55pm