test(cli): cover noun-first object parser

[overtrue]

Related issue

Automation run: rustfs/cli test gap detection.

Background

The noun-first rc object ... command group was added to make object workflows easier to discover, but the parser coverage on origin/main only exercised the bucket CORS path. That left several object subcommand delegations untested, so regressions in option wiring could silently break expected object commands.

Root cause

The object command group delegates to existing command argument structs, but there were no parser tests proving that the noun-first routes preserve important flags and positional arguments for copy, move, show, head, find, and tree.

Solution

Added focused parser tests for rc object copy, rc object move, rc object show, rc object head, rc object find, and rc object tree. The tests assert that representative positional arguments and options land in the expected delegated command variants. I also added a minimal make pre-commit target that runs the repository's documented formatting, clippy, and test checks so the automation-required validation command is available.

Validation

• cargo test -p rustfs-cli cli_accepts_object_
• make pre-commit