Critical fixes for false negatives in DR test reporting:
1. Database verification fix:
- Changed from 'findstr' (CMD) to 'Select-String' (PowerShell native)
- findstr was failing in PowerShell context causing db_status to be empty
- Result: DB with 42,625 tables was incorrectly reported as FAILED
2. Restore log collection fix:
- Changed from 'type' (CMD) to 'Get-Content' (PowerShell native)
- type command doesn't work through SSH PowerShell context
- Added -ErrorAction SilentlyContinue for cleaner error handling
- Simplified fallback logic using [-z] instead of string matching
Both issues were caused by mixing CMD commands in PowerShell context.
Now uses PowerShell-native commands throughout for consistency.
Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
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