@cloudflare/voice: preserve active voice sessions across Worker deployments

[Abdulmumin1]

Description

Deploying a Worker while an @cloudflare/voice session is active disconnects the browser and ends the voice
session.

Reproduction

1. Create a voice agent using withVoice(Agent, ...).
2. Connect with VoiceClient.
3. Start a voice call.
4. Run wrangler deploy.
5. The active voice session disconnects and cannot resume.

Expected behavior

After deployment, the client reconnects to the same Durable Object/session and continues the call, preserving
relevant transcript and conversation state.

Environment

• @cloudflare/voice: 0.2.1
• agents: 0.14.3
• wrangler: 4.98.0