Document secure agent transcript viewer goal

[m17kea]

Context

Record a secure conversation-viewer goal because the current dashboard shows operational summaries but not complete visible agent activity.

TL;DR

Document a persistent, read-only agent transcript view for Symphony issues.

Summary

• Define the issue-scoped transcript viewer experience
• Capture normalized visible app-server events instead of unstable transcript files
• Require durable retention, credential redaction, and authenticated access
• Keep live app-server transports private and defer interactive steering
• Identify transcript projection as a possible upstream contribution

Alternatives

• Exposing app-server WebSockets from EKS was rejected as experimental and unnecessarily risky.
• Relying on pod-local transcript files was rejected because emptyDir data is ephemeral.
• Parsing Codex transcript files was rejected because their format is not a stable integration contract.

Test Plan

• make -C elixir all
• git diff --check
• Reviewed the rendered Markdown for clear future-only scope and security guardrails