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.txt

@@ -0,0 +1,19 @@
+RUN {
+    CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
+    CONFIGURE CONTROLFILE AUTOBACKUP ON;
+    CONFIGURE COMPRESSION ALGORITHM 'BASIC';
+
+    # Full backup COMPRESSED + Archive logs (șterge logs după backup)
+    BACKUP AS COMPRESSED BACKUPSET
+        INCREMENTAL LEVEL 0
+        TAG 'DAILY_FULL_COMPRESSED'
+        DATABASE
+        PLUS ARCHIVELOG DELETE INPUT;
+
+    # Backup SPFILE și Control File
+    BACKUP AS COMPRESSED BACKUPSET SPFILE;
+    BACKUP CURRENT CONTROLFILE;
+
+    # Cleanup old backups (păstrează ultimele 2 - REDUNDANCY 2)
+    DELETE NOPROMPT OBSOLETE;
+}