fix: freestyle initialization in local developement

[iNerdStack]

Description

This PR introduces a small fix for freestyle SDK initialization when no freestyle key is present in local development.

Related Issues

Type of Change

• [x] Bug fix
• [ ] New feature
• [ ] Documentation update
• [ ] Release
• [ ] Refactor
• [ ] Other (please describe):

Testing

Screenshots (if applicable)

Additional Notes

---

[!IMPORTANT] Fixes Freestyle SDK initialization in domain.ts by checking for FREESTYLE_API_KEY and throwing an error if missing.

• Behavior:
  • Introduces initializeSdk() in domain.ts to check for FREESTYLE_API_KEY before initializing FreestyleSandboxes.
  • Throws TRPCError with code PRECONDITION_FAILED if FREESTYLE_API_KEY is missing.
• Error Handling:
  • Ensures domain publishing features are only available when FREESTYLE_API_KEY is configured.

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