Text mode: doctor-style key/value layout. JSON mode: schema.v1 wire
record. Honors `--config <path>` via the established
`kebab_app::schema_with_config(&cfg)` facade pattern (per the P3-5 /
P4-3 regression conventions).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>