Fixed CSV rate upload to use the company name provided in the upload form instead of reading it from the CSV file's companyName column. This prevents "unknown" or incorrect company names from being used.
## Changes
**Domain Layer**
- Updated `CsvRateLoaderPort` interface to accept optional `companyNameOverride` parameter
- Modified `CsvRateSearchService.loadAllRates()` to pass company name from config when loading rates
**Infrastructure Layer**
- Updated `CsvRateLoaderAdapter.loadRatesFromCsv()` to accept `companyNameOverride` parameter
- Modified `mapToCsvRate()` to use override company name if provided, otherwise fallback to CSV column value
- Added logging to show which company name is being used (from override or CSV)
**Application Layer**
- Updated CSV upload controller to pass `dto.companyName` to the loader
## Impact
- When uploading a CSV file through the admin interface, the company name from the form is now correctly used
- Existing CSV files with "unknown" in the companyName column will now show the correct company name from the database configuration
- Backward compatible: if no override is provided, the CSV column value is still used
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
