New RPC endpoint to get detailed progress for a molecule (parent issue with child steps). Returns moleculeID, title, assignee, and list of steps with their status (done/current/ready/blocked) and timestamps. Used when user expands a worker in the activity feed TUI. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>