Function runAutoCommand

Execute the auto subcommand: walk cmd.rootDir, detect every GitHub repo in any recognized project manifest, and run the same scan → render orchestration all performs — but with the repo list sourced from filesystem discovery instead of --repo flags.

Persistence mirrors all: with no --cache (cacheExplicit false) the scan runs cache-free in memory; with --cache it persists to cachePath and resumes like scan + render.

Exit semantics:

• 2 when discovery finds nothing (render is skipped).
• The scan exit code when a persisted scan fails (disk path only; render skipped).
• Otherwise the render exit code (0 on success, 1 on a render error).