Engram v1.10.7 — Sync Embedded OpenCode Plugin

Syncs the embedded OpenCode plugin template (used by engram setup opencode) with the chat.message hook fix from v1.10.6.

What Changed

• Embedded plugin updated — users running engram setup opencode now get the fixed plugin that uses chat.message instead of the broken prompt event
• Existing users who already ran setup need to re-run engram setup opencode to pick up the fix