Add --version flag to the aggrete CLI

[muhammad-a-dev]

Summary

Adds a --version flag to the aggrete CLI so aggrete --version prints the installed package version and exits 0.

Fixes #3

Changes

• Register --version on the argument parser in aggrete/proxy.py (main() / CLI entry via cli())
• Resolve the version with importlib.metadata.version("aggrete") and print aggrete <version>
• Add tests/test_version.py covering the flag

Test plan

• aggrete --version prints e.g. aggrete 0.5.2 and exits 0
• pytest tests/test_version.py passes
• Existing suite still passes (pytest)

[muhammad-a-dev]

Thanks for reviewing when you can — this is a first-time contribution to the repo, so Actions is waiting on Approve and run workflows for the PR checks to start.

Locally: aggrete --version prints the package version and exits 0; tests/test_version.py covers the flag.

Happy to adjust if anything needs changing.

[aggrete-dev]

Welcome, and thanks for the contribution. This is a clean, focused PR: it does exactly what #3 asked, nothing more, with a real test to back it. Nice touch importing importlib.metadata lazily so the version lookup only happens when the flag is used.

One entirely optional note for the future, not a change I need here: argparse also has a built-in action="version" you could use instead of store_true plus a manual check, but honestly your version reads well and the lazy import is arguably nicer, so I am happy to take it as is.

CI is green and I am merging. Thanks again for jumping in, and it is great to have you here. If you are up for more, there are a few other good first issues open.