feat(javascript): voice-agents v1 — secure-temp-key

[github-actions]

Adds the secure-temp-key recipe for voice-agents v1 (javascript).

Demonstrates the recommended browser security pattern: mint a short-lived JWT
with auth.v1.tokens.grant(), then connect to the Voice Agent API using only
that temporary token. The main API key never reaches the client.

Closes part of #559

[claude]

@deepgram/devrel — VP escalation: PR #561 has been open since 2026-05-18 with no CI checks running. workflow_dispatch for Lead — Test failed (GITHUB_TOKEN 403). Manual re-trigger or review needed.

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

[claude]

@deepgram/devrel — VP escalation: PR #561 has been stuck for >4 hours and re-trigger attempts have not resolved it. Manual review needed.

State: labels=[type:samples, language:javascript], no E2E checks have ever run (empty statusCheckRollup). Workflow dispatch blocked by GITHUB_TOKEN 403. Last updated 2026-05-22.

[claude]

@deepgram/devrel — VP escalation: PR #561 has been stuck for >5 days. Workflow dispatch is blocked (GITHUB_TOKEN 403). Manual intervention needed to trigger tests or merge.

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

[claude]

@deepgram/devrel — VP escalation: PR #561 has been stuck since 2026-05-18 with no CI checks running. Re-trigger via workflow_dispatch returned 403. Manual review needed.

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

[claude]

@deepgram/devrel — VP escalation: PR #561 has been stuck for >24 hours and workflow re-trigger attempts failed (HTTP 403 — GITHUB_TOKEN lacks workflow dispatch permission). Manual review needed.

State: No CI checks have run. Needs manual trigger of Lead — Test workflow or direct review.