feat(javascript): voice-agents v1 — greeting-persona

[github-actions]

Adds the greeting-persona recipe for voice-agents v1 (JavaScript).

Demonstrates configuring a voice agent with:

• A custom greeting message that plays immediately on connection
• Persona constraints via the system prompt (name, role, tone, topic boundaries)
• Topic guardrails so the agent refuses off-topic requests gracefully

Closes #567

[claude]

@deepgram/devrel — VP escalation: PR #572 has been stuck for >9 days with no CI checks triggered. Workflow re-trigger not possible due to GITHUB_TOKEN permissions. Manual review needed.

State: labels=[type:samples, language:javascript], checks=none

[claude]

@deepgram/devrel — VP escalation: PR #572 has been stuck for >3 days with no CI checks running. Workflow dispatch triggers failed (HTTP 403 — GITHUB_TOKEN limitation). Manual intervention needed to trigger tests or merge.

State: no checks, no reviews, last updated 2026-06-09

[claude]

@deepgram/devrel — VP escalation: PR #572 has been stuck for >59 hours. Workflow re-trigger failed (GITHUB_TOKEN 403). Manual review needed.

State: Labels: type:samples, language:javascript. Checks: NONE

[claude]

@deepgram/devrel — VP escalation: PR #572 has no CI checks and has been stale for >7 days. Workflow dispatch is blocked by token permissions. Manual re-trigger of CI or review needed.

State: labels=[language:javascript, type:samples], checks=none