fix: resolve #3025 — Pet Dæmon: Guest code evaluation requests

[tudragon154203]

Summary

fix: resolve #3025 — Pet Dæmon: Guest code evaluation requests

Problem

Severity: High | File: packages/pet-daemon/src/guest-evaluate.js

Create a new module that provides the evaluate function to guest code. This function should accept a program string and package it as an evaluation request message to be sent to the host via the mail system. The function should return a promise that resolves or rejects based on the host's response (allow/deny).

Solution

Export a makeGuestEvaluator(mailbox) function that returns an evaluate(program) async function. The evaluate function should construct a structured mail message of type 'evaluation-request' containing the source code, send it through the mailbox, and await a response message of type 'evaluation-response'. Include source location metadata and a unique request ID for correlation.

Changes

• packages/pet-daemon/src/guest-evaluate.js (new)
• packages/pet-daemon/src/host-evaluate-handler.js (new)

Testing

• Existing tests pass
• Manual review completed
• No new warnings/errors introduced

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