Skyrim code and configuration review

Review priorities

1. Correctness and data integrity.
2. Safety of file writes and rollback behavior.
3. API, ABI, runtime, and save compatibility.
4. Error handling, diagnostics, and observability.
5. Concurrency, ownership, lifetime, and resource management.
6. Performance proportional to the actual hot path.
7. Maintainability: cohesion, naming, duplication, boundaries, and testability.
8. Release behavior and upgrade path.

Method