Oracle DR: Add RMAN backup scripts with enhanced logging

- Add rman_backup.bat: FULL backup with live console output and log file
- Add rman_backup_incremental.bat: INCREMENTAL backup with live output
- Add rman_backup.txt: RMAN script for LEVEL 0 FULL backup
- Add rman_backup_incremental.txt: RMAN script for LEVEL 1 CUMULATIVE backup
- Scripts are portable: use current directory instead of hardcoded paths
- Logging: simultaneous output to console AND log file using PowerShell Tee-Object
- Log files saved in logs/ subdirectory with timestamps

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

oracle/standby-server-scripts/rman_backup.bat

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+@echo off
+setlocal enabledelayedexpansion
+
+REM ===================================================================
+REM Oracle RMAN FULL Backup with Logging
+REM Runs at: 02:30 AM (scheduled task)
+REM Duration: ~30 minutes
+REM ===================================================================
+
+REM Get script directory (where this .bat file is located)
+set SCRIPTDIR=%~dp0
+set LOGDIR=%SCRIPTDIR%logs
+set TIMESTAMP=%date:~-4,4%%date:~-7,2%%date:~-10,2%_%time:~0,2%%time:~3,2%%time:~6,2%
+set TIMESTAMP=%TIMESTAMP: =0%
+set LOGFILE=%LOGDIR%\backup_full_%TIMESTAMP%.log
+
+REM Create log directory if not exists
+if not exist "%LOGDIR%" mkdir "%LOGDIR%"
+
+echo ========================================= >> "%LOGFILE%" 2>&1
+echo Oracle RMAN FULL Backup Started >> "%LOGFILE%" 2>&1
+echo Date: %date% %time% >> "%LOGFILE%" 2>&1
+echo Script Directory: %SCRIPTDIR% >> "%LOGFILE%" 2>&1
+echo ========================================= >> "%LOGFILE%" 2>&1
+echo. >> "%LOGFILE%" 2>&1
+
+REM Run RMAN backup - show in console AND save to log (using PowerShell tee)
+powershell -Command "& cmd.exe /c 'rman target sys/romfastsoft@roa cmdfile=\"%SCRIPTDIR%rman_backup.txt\"' 2>&1 | Tee-Object -FilePath '%LOGFILE%' -Append"
+
+set EXITCODE=%ERRORLEVEL%
+
+echo. >> "%LOGFILE%" 2>&1
+echo ========================================= >> "%LOGFILE%" 2>&1
+echo Oracle RMAN FULL Backup Completed >> "%LOGFILE%" 2>&1
+echo Date: %date% %time% >> "%LOGFILE%" 2>&1
+echo Exit Code: %EXITCODE% >> "%LOGFILE%" 2>&1
+echo ========================================= >> "%LOGFILE%" 2>&1
+
+REM Print summary to console
+echo [%date% %time%] RMAN FULL backup completed with exit code: %EXITCODE%
+echo [%date% %time%] Log file: %LOGFILE%
+
+exit /b %EXITCODE%