docs: multispeaker is only for s2-pro

[Kilerd]

Summary by CodeRabbit

Release Notes

• Documentation
  • Clarified that multi-speaker dialogue support is exclusively available with the S2-Pro model in product and API documentation.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 7e4f47c9-525a-48a1-81bf-82a58c18982f

📥 Commits

Reviewing files that changed from the base of the PR and between e3cc904 and 6049c5b.

📒 Files selected for processing (2)

• api-reference/openapi.json
• developer-guide/models-pricing/models-overview.mdx

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📝 Walkthrough

Walkthrough

This PR updates the TTSRequest schema in the OpenAPI specification and the models overview documentation to explicitly clarify that multi-speaker dialogue support is exclusive to the S2-Pro model, with no functional changes to the API itself.

Changes

Cohort / File(s)	Summary
Schema Documentation api-reference/openapi.json	Updated references and reference_id property descriptions in the TTSRequest schema to specify that multi-speaker usage is only available with the S2-Pro model.
Developer Guide developer-guide/models-pricing/models-overview.mdx	Added "(S2-Pro exclusive)" clarification to the multi-speaker dialogue feature in the S2-Pro model capabilities list.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• fix: improve docs for openapi.json, expose new params for tts #28: Modifies the TTSRequest schema structure in the same OpenAPI specification file
• feat: s2-pro #56: Updates Models Overview documentation to emphasize S2-Pro-specific features
• s2 pro everywhere #55: Makes overlapping documentation changes across the models overview and OpenAPI TTS references

Suggested reviewers

• twangodev

Poem

🐰 Hopping through docs with a keen eye so bright,
"S2-Pro exclusive!" we now clarify right,
Multi-speaker talks need the Pro touch, you see,
The schemas and guides now agree perfectly! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch mention-multispeaker-is-for-s2-pro

📝 Coding Plan

• Generate coding plan for human review comments

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