AutoStory M4 Run evidence and lab tooling #138

• Scope: run records (one folder per run: log, events, frames of failed attempts, build info), run-event hooks, route pictures (planned vs walked), the lab channel, and one lab CLI with guards (MCP optional later). Also the lab-channel fix: a window focus change cancels holds.
• PRs: #132 (recorder), #116 (lab half), #107, #125, #131.
• Done when: a failed AutoStory run leaves a record with the failing attempt's frame, and a route picture can be drawn from that record.

Tracked by the AutoStory master issue. Design: AutoStory-Architecture.md; PR tree and sizes: FRLG_SIZING.md.