Refactor: Remove redundant get_latest_log_entry wrapper and optimize logging retrieval

[RainRat]

This PR addresses a 'Redundant Wrapper' and 'Duplication' issue in evolverstage.py.

• What: Removed the get_latest_log_entry() function and updated get_evolution_status() to use a single call to get_recent_log_entries(5) to populate both its latest_log and recent_log fields.
• Why: get_latest_log_entry() was a simple wrapper that added overhead without providing additional value. By consolidating its logic into get_evolution_status(), we avoid reading the battle log file multiple times, improving performance and code clarity.
• Verification: All existing tests were updated to reflect the removal of the function and the consolidation of logic. The full test suite (184 tests) passes successfully.

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PR created automatically by Jules for task 9326966221030481857 started by @RainRat

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