💡 What: Replaced format! macro with String::with_capacity and push/push_str in get_all_fingerprints.
🎯 Why: In Rust, avoiding format! for simple string concatenation prevents heavy runtime formatting machinery overhead.
📊 Impact: Improves execution speed and reduces binary bloat.
🔬 Measurement: Verify compilation size and microbenchmark the get_all_fingerprints string creation logic.