Add Ralph — built-in work monitor squad member #14

Summary

Add Ralph as a built-in squad member whose job is keeping tabs on work. Like Scribe tracks decisions, Ralph tracks and drives the work queue. Once activated, Ralph self-chains the coordinator's work loop — checking for open issues, draft PRs, review feedback, and CI failures — keeping the squad working through the backlog without manual nudges.

Motivation

Squad agents do great work when active, but after completing a batch of tasks they stop and wait. Someone has to manually come back and say "keep going" or label the next issue. Ralph solves this with two mechanisms:

1. In-session: Ralph self-chains the coordinator's work loop — finish work → check for more → do it → repeat — until the board is clear or the user says "idle"
2. Between sessions: A heartbeat GitHub Actions workflow runs on a cron schedule, auto-triaging issues and assigning @copilot so work continues even when no one is at the keyboard

What Ralph monitors

Talking to Ralph

• Start: "Ralph, go" / "Keep working" / "Work until done"
• Stop: "Ralph, idle" / "Take a break"
• Status: "Ralph, status" / "What's on the board?"
• Scope: "Ralph, just issues" / "Ralph, skip CI"

Ralph checks in every 3-5 rounds with a summary and asks whether to continue.