Oracle DR: Add comprehensive restore test debugging guide to README
- Add section 'Debugging Restore Tests' with practical troubleshooting commands
- Check backup files on Proxmox: list, count, verify timestamps
- Verify backup files on DR VM: NFS mount, file counts, sizes
- Check DR test results: parse logs for PASSED/FAILED status
- Simulate test locally: manual restore steps for debugging
- Common issues table with checks and fixes
- Verify naming convention is active (L0_*, L1_* format)
- Manual test run with verbose output for real-time monitoring
Helps diagnose issues like:
- False FAILED notifications
- Missing datafiles
- RMAN-06023 errors
- Backup selection problems
Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
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