v0.4.0

Added

• Plan for porting MCTS scanner engine to Rust (plans/port-mcts-to-rust.md).

Changed

• Implemented dynamic worker count using DEFAULT_WORKERS in src/fsgc/__main__.py.
• Optimized os.scandir fetching and added import time to src/fsgc/scanner.py as part of "Low-Hanging Fruit" optimizations.

Fixed

• Addressed an accidental syntax error in src/fsgc/__main__.py.