Refactor: Add type hinting and explicit attribute declaration in TargetedReviewer

[pyob-bot]

Summary of Changes

• Added explicit return type hint (-> None) to the __init__ method of TargetedReviewer.
• Added explicit type annotations for local variables normalized_dir and normalized_file.
• Added an explicit type declaration for the self.forced_target_file instance attribute to improve code clarity and static analysis support.

Technical Impact

• Improves code maintainability and readability by adhering to modern Python type-hinting standards.
• Enhances compatibility with static type checkers (e.g., mypy, pyright), reducing the likelihood of runtime attribute errors.