fix: replace emoji with ASCII in console output, refactor git_repo fixture to GitPython

[SemTiOne]

Minimalism.

[github-actions]

♟️ chess-review-bot — PR Game Review

Accuracy: 85.8/100 · 8 files · +68/-84 · 0 Blunder??

File	Category	Why
standup/config.py	Excellent	moderate change, no risk signals
standup/git_reader.py	Great!	has a matching test file changed alongside it
standup/history.py	Excellent	moderate change, no risk signals
standup/main.py	Excellent	moderate change, no risk signals
standup/rate_limiter.py	Excellent	moderate change, no risk signals
standup/security.py	Excellent	moderate change, no risk signals
tests/test_git_reader.py	Excellent	moderate change, no risk signals
tests/test_main_startup.py	Excellent	moderate change, no risk signals

chess-review-bot scores diffs, not people. Run chessreview --format text locally for the full report.

[codecov]

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