chore/types scripts

[DanteX86]

This PR adds and corrects static type annotations across the scripts/ folder and removes stray control characters that were breaking parsing.

Summary of changes

• Add precise type hints and return annotations in:
  • scripts/ioc_validator.py
  • scripts/ioc_validator_simple.py
  • scripts/data_versioning.py
  • scripts/data_validation.py
  • scripts/data_preprocessing.py
  • scripts/generate_synthetic_data.py
  • scripts/threat_visualizer.py
• Fix invalid non-printable/control characters in function signatures and source (e.g., U+000E/U+0000/U+007F), restoring valid syntax
• Align IOC validator return types (Tuple[bool, List[Dict[str, Any]]]) and ensure unknown-pattern paths return (False, [])
• Harden YAML/JSON config loads with safe typing and fallbacks to {} where necessary
• Add missing -> None annotations for main() and side-effect functions
• Minor cleanup to method definitions and imports in threat_visualizer.py (typing imports, proper method signatures)

Type-checking status

• mypy scripts/: Success: no issues found in 9 source files

Testing/verification

• Ran mypy locally for scripts/ (Python 3.11): clean
• No runtime behavior changes intended; changes are type annotations and small refactors for safety/readability

Risk

• Low; purely typing plus minor structural fixes to resolve parsing issues

Follow-ups

• Optionally extend typing into src/ modules and tests
• Consider enabling stricter mypy flags incrementally (e.g., disallow-any-generics) once baseline is stable.