Attention refactor, better categorization and explanation

feat(output): Add token scrubber with per-position top-5 next-token probabilities

Added full sequence to analysis, still need to do output scrubber

Migrate from Gemini to OpenRouter API

Migrate from google-generativeai to google-genai SDK

Add Hugging Face deployment prep: .gitignore, load_dotenv, API tests

cleanup for merge

conductor(checkpoint): Checkpoint end of Phase 1: Backend Support for Ablation

feat(ablation): Unify ablation execution into execute_forward_pass

test(ablation): Verify multi-layer head ablation utility

test(ablation): Add reproduction script for head ablation

Fix multi-layer ablation to ablate all heads simultaneously

rules change for simple git commit messages

Add comprehensive test suite for utility modules (73 tests)