Usage: photoc [global options] check <file|directory> [--recursive] [--only-errors] [--json]
       photoc check --help

Audit JPEG structural readability

Status: available for JPEG files (read-only)

Example:
  photoc check photo.jpg
  photoc check ~/Pictures --recursive
  photoc check ~/Pictures --recursive --only-errors
  photoc check ~/Pictures --json

Options:
  --recursive          Include nested directories
  --only-errors        List ERROR rows only; summary counts all checked files
  --json               Print structured JSON

Read-only; rows are sorted by path. Warnings return 0; errors return 1.
Checks structural readability, not visual quality or complete metadata validity.
