feat(python): voice-agents v1 — guardrails

[github-actions]

Adds the guardrails recipe for voice-agents v1 (Python).

Demonstrates topic enforcement and response validation guardrails for a voice
agent using prompt constraints and function calling. The agent is restricted to
a support-only scope with two guardrail functions:

• validate_response — checks draft replies for PII before speaking
• redirect_conversation — steers off-topic requests back on scope

Closes part of #565

[claude]

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

[claude]

@deepgram/devrel — VP escalation: PR #566 has been stuck since 2026-05-25 with no CI checks running. Re-trigger via workflow_dispatch returned 403. Manual review needed.

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[claude]

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[claude]

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[claude]

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

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