Description

Functions like search_single (inside fetch_jobspy_jobs) and fetch_single_term (inside fetch_google_jobs_parallel) are missing explicit Python return type hints.

Why it matters

Type hints on inner closures are just as important as outer functions for static analyzers like mypy.

Acceptance Criteria

• Add -> Dict[str, Any] or -> List[Dict[str, Any]] to the nested worker functions
• Passes pre-commit run --all-files