chore: update OpenAPI schema

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Auto-generated update from https://api.fish.audio/openapi.json

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Summary by CodeRabbit

• New Features
  • Agent session details now include the participant identity, the agent’s participant identity, and when the agent joined. These fields may be null.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 1592d4d7-4884-4d72-8c63-ade588336260

📥 Commits

Reviewing files that changed from the base of the PR and between 62656ef and 4bb3c4f.

📒 Files selected for processing (1)

• api-reference/openapi.json

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📝 Walkthrough

Walkthrough

The AgentSessionSummary schema and the GET /v1/agent/sessions/{session_id} response now include three nullable, default-null string fields: participant_identity, agent_participant_identity, and agent_joined_at.

Changes

Agent session fields

Layer / File(s)	Summary
Session response contract api-reference/openapi.json	The AgentSessionSummary schema and session detail response add the same three nullable, default-null string fields.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Feature

Suggested reviewers: him188

Merge Risk: ⚪ Minimal · up to 4bb3c

This update extends the agent session response with optional participant identity and agent join-time fields. Existing consumers should be unaffected because the fields are nullable and default to null. Merge risk is minimal.

Architecture Summary

Architecture risk: 🔵 Low · up to 4bb3c

The change affects 1 system.

Changed systems: api-reference

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — api-reference (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in api-reference/openapi.json: The GET /v1/agent/sessions/{session_id} response schema adds nullable, default-null string fields for participant identity, agent participant identity, and agent join time.
• observed — Modified behavior in api-reference/openapi.json: AgentSessionSummary adds the same three nullable, default-null string fields for participant identity, agent participant identity, and agent join time.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: updating the OpenAPI schema.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

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