Before this change, only the top-level parser defined --json, -v and -q.
Argparse processes arguments left-to-right and hands off to the subparser
after seeing the subcommand name, so the idiomatic
metin-release release inspect --source X --json
failed with 'unrecognized arguments: --json'. Users had to write
metin-release --json release inspect --source X
which is the opposite of what every modern CLI does. Attach a shared
--json/-v/-q flag set to every subparser via a small helper. Same dest
means the last occurrence on the command line wins, which is the intuitive
behaviour. Both placements are now accepted; tests unchanged.
Pytest suite with a tiny_client fixture, an ephemeral Ed25519 keypair
fixture, and a threaded HTTPServer helper. Exercises cli dispatch,
inspect (including excluded-path handling), build-manifest and sign
against the real m2dev-client scripts, diff-remote via a local server,
and the full release publish composite against a local rsync target.
