fix(train): move GitStatusChecker out of module level to prevent Dock…

[DeepKnowledge1]

Problem

The GitStatusChecker was instantiated and executed at module level in train.py:

# Ran on every import — even for --help
checker = GitStatusChecker()
checker.check_status()

This caused two issues:

1. Docker crash — git fetch fails inside containers that have no git remote, no SSH keys, or no git binary. Because subprocess.run uses check=True, it raises CalledProcessError and kills the process before training starts.
2. Import side effect — any code that imports anomavision.train (including cli.py building the argument parser for --help) would trigger a network call unconditionally.

Fix

Moved the git check inside main() with two additional guards:

• Only runs if actually inside a git repository (checker.is_repo())
• Wrapped in try/except so a git failure never blocks training

try:
    checker = GitStatusChecker()
    if checker.is_repo():
        checker.check_status()
except Exception:
    pass  # Never block training over a git check

Impact

• Fixes CLI commands not being accessible in Docker (related to #<issue_number>)
• No change to training behavior
• Git status check still runs when training locally inside a valid repo

Testing

• anomavision train --help works inside Docker without errors
• anomavision train --config config.yml runs successfully
• Git status check still prints when running locally in a valid repo