Merge multiple CSV or Excel files with intelligent column matching and automatic deduplication.

• Performs fuzzy column matching to align headers across files with different naming conventions (e.g., "firstname" to "first_name", "e-mail" to "email")
• Detects and resolves duplicate records using configurable strategies: keep first, keep last, keep longest value, or flag for manual review
• Handles schema mismatches, encoding detection, and data type normalization across files
• Generates detailed merge reports including conflict logs, data quality metrics, deduplication statistics, and source file tracking for each row
• Supports multiple output formats: CSV, Excel, JSON, SQL INSERT statements, and Parquet for large datasets