Search Korean government procurement notices (나라장터).
    Returns BOTH regular bid notices (입찰공고) AND preliminary specifications (사전규격)
    for service-type (용역) projects including consulting, development, and SI.

    Args:
        keyword: Search keyword for bid title (공고명).
                 Examples: '인공지능', 'AI', '플랫폼', '시스템 구축', etc.
        days: Search window in days from today (default: 7).
              Increase for older bids, e.g. 30, 60, 90.

    Returns:
        Formatted string with bid information
    

    Search government procurement notices with department context for personalized recommendations.
    Returns up to 60 results (30 regular bids + 30 pre-specs) with analysis instructions.
    LLM can flexibly present Top N items or all relevant items based on user's request.
    Prioritizes items with non-zero budgets.

    Args:
        keyword: Search keyword (e.g., 'AI', 'Cloud', '플랫폼')
        department_profile: Description of your team/department.
                           Examples: 'UI/UX 디자인팀', 'Database Migration Unit',
                                    'AI/ML 개발팀', '클라우드 인프라팀'
        days: Search window in days from today (default: 7).
              Increase for older bids, e.g. 30, 60, 90.

    Returns:
        Formatted recommendations with strategic analysis
    

    Download and extract text from bid attachment (RFP/제안요청서) for strategic analysis.
    Supports HWP, HWPX, PDF, DOCX, XLSX, and ZIP files.
    ZIP files are processed with priority: 제안요청서 > 과업지시서 > .hwp > .pdf

    Args:
        file_url: Attachment URL (ntceSpecDocUrl1 from search results)
        filename: Filename (ntceSpecFileNm1 from search results)
        department_profile: Optional - Your team description for strategic analysis.
                           If provided, response includes analysis prompts for Fit Score,
                           Core Tasks, Winning Strategy, and Risk Factors.

    Returns:
        Extracted document text with optional analysis prompts