- Removed Output.cs and migrated all reporting, formatting, and statistics logic to a new BenchmarkReportWriter static class.
- Extended ReportingContext with run-header fields for richer output metadata.
- Updated BenchmarkLoop to use BenchmarkReportWriter and the new ReportingContext.
- Centralized all output file generation (.log, .LLM, .output) and formatting helpers in BenchmarkReportWriter.
- Improved separation of concerns and unified output artifact naming and metadata.
