Pi bridge: onDelivery never fires after first session (ephemeral TLS identity diverges from persisted agentId

[claguna-venflow]

Steps to reproduce:

1. Start Pi with agent-comms extension — first session works (reactive).
2. Restart Pi.
3. From Claude Code, send a message to the shared room.
4. Pi never wakes up. onDelivery is never called.

Observed behavior:

Pi only receives messages when the user explicitly asks it to poll the room (read_room).
It cannot respond autonomously.

Expected behavior:

Pi should wake up automatically (triggerTurn: true) whenever an actionable message (room
message, DM, invite) arrives, regardless of how many times the session has been
restarted.