feat: Add comprehensive metrics tracking to CSV reader#22900
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Add metrics collection for CSV file reading operations: - Implement method on CsvSource for dynamic casting - Track bytes scanned when fetching file data - Record output metrics (row count) for both file and stream-based CSV reading paths These metrics improve observability and enable better performance monitoring of CSV datasource operations during query execution.
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This PR enhances observability of CSV file reading operations by adding comprehensive metrics collection. These metrics enable better performance monitoring and debugging of CSV datasource operations during query execution, helping identify bottlenecks and optimize I/O operations.
What changes are included in this PR?
as_any()method onCsvSourcefor dynamic casting support