🧹 Refactor _looks_like_seed_phrase to be more concise

[google-labs-jules]

🎯 What: Simplified _looks_like_seed_phrase in hooks/secret_scanner.py using a ternary assignment instead of a nested if/else.
💡 Why: Reduces cognitive complexity and line count of the function. Resolves the "Function is too long" code health issue.
✅ Verification: Verified by running the test suite (pytest tests/) to ensure no functionality is broken. Tests pass 100%.
✨ Result: Improved readability while maintaining full functionality.

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PR created automatically by Jules for task 2666503815903474391 started by @zknpr

[google-labs-jules]

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