#441 cli: add `--quiet` to `doberman demo` so it can run as a CI smoke test

[Anonymous]

Originally created by: fu351
Originally owned by: blackcoderx

doberman demo runs the scripted attack reel through the real engine, prints one narrated line per scenario, a summary table, and exits non-zero when a scenario's verdict doesn't match (src/doberman/cli/main.py:1430 onward). That makes it a useful "is the engine alive" check in a pipeline, except there's no way to silence the narration: its options are --path, --mode, --fast. scan already has the flag this needs (--quiet, :248-253: "Suppress human-readable stdout... useful for CI").

What to do

1. Add quiet: bool = typer.Option(False, "--quiet", "-q", help=...) to demo, copied from scan's option.
2. When set, skip the banner, the per-scenario on_scenario echo and the closing "Run doberman dash" hint; keep the summary table (or a one-line "N/N scenarios matched") and the exit code exactly as they are.
3. New tests/unit/test_cli_demo_quiet.py: demo --fast --quiet prints far fewer lines than demo --fast, and the exit code is identical.

Display only; the scenarios and the engine path are untouched.

[Anonymous]

Originally posted by: blackcoderx

Claiming this one — will add --quiet to doberman demo following the scan --quiet pattern.

[Anonymous]

• assigned_to: blackcoderx

[Anonymous]

Ticket changed by: fu351

• status: open --> closed