fix: align logs path with debug paths

[Bortlesboat]

Summary

• Align cortex logs with cortex debug paths by deriving logs from the canonical Cortex home directory.
• Reuse the existing CLI path helper so debug path reporting also honors the same Cortex home resolution.
• Add CLI coverage that compares cortex debug paths --json and cortex logs under a temp CORTEX_HOME.

Related to PlatformNetwork/bounty-challenge#52660.

Verification

• cargo test -p cortex-cli --test logs_paths logs_directory_matches_debug_paths_logs_dir -- --nocapture
• cargo check -p cortex-cli
• cargo fmt --check --package cortex-cli
• git diff --check

[greptile-apps]

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