Oracle DR: Fix backup retention and monitoring for new naming convention

Problem: Backups accumulated on DR (73 files, 4 days) instead of keeping only 2 days
- transfer_incremental.ps1 had no cleanup function (ran 2x/day without cleanup)
- transfer_to_dr.ps1 cleanup had poor logging
- oracle-backup-monitor-proxmox.sh couldn't detect new L0/L1 backup format

Changes:
- Add cleanup to transfer_incremental.ps1 (delete backups older than 2 days)
- Improve cleanup logging in transfer_to_dr.ps1 (shows count before/after)
- Update oracle-backup-monitor-proxmox.sh to detect both naming conventions:
  * Old: *FULL*.BKP, *INCR*.BKP
  * New: L0_*.BKP (Level 0), L1_*.BKP (Level 1)
- Remove temporary files from /input/ directory

Result: Monitor now correctly reports backup age, cleanup runs after each transfer

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

oracle/standby-server-scripts/transfer_incremental.ps1

@@ -48,6 +48,34 @@ function Get-IncrementalBackups {
     return $backupFiles
 }
 
+function Cleanup-OldBackupsOnDR {
+    param([int]$RetentionDays = 2)
+
+    Write-Log "Cleaning up old backups on DR (keeping last $RetentionDays days)..."
+
+    try {
+        # Count fișiere înainte de cleanup
+        $countBefore = & ssh -n -p $DRPort -i $SSHKeyPath "${DRUser}@${DRHost}" "find '$DRPath' -name '*.BKP' -type f | wc -l" 2>&1
+        Write-Log "Backups before cleanup: $countBefore"
+
+        # Cleanup: șterge fișiere mai vechi de $RetentionDays zile
+        $cleanupCmd = "find '$DRPath' -name '*.BKP' -type f -mtime +$RetentionDays -delete 2>&1"
+        $result = & ssh -n -p $DRPort -i $SSHKeyPath "${DRUser}@${DRHost}" $cleanupCmd 2>&1
+
+        if ($LASTEXITCODE -ne 0) {
+            Write-Log "Cleanup warning: $result" "WARNING"
+        }
+
+        # Count fișiere după cleanup
+        $countAfter = & ssh -n -p $DRPort -i $SSHKeyPath "${DRUser}@${DRHost}" "find '$DRPath' -name '*.BKP' -type f | wc -l" 2>&1
+        $deleted = [int]$countBefore - [int]$countAfter
+
+        Write-Log "Cleanup completed: Deleted $deleted old backup files, $countAfter remaining"
+    } catch {
+        Write-Log "Cleanup error: $_" "WARNING"
+    }
+}
+
 try {
     Write-Log "========================================="
     Write-Log "Oracle INCREMENTAL Backup Transfer Started"
@@ -117,6 +145,9 @@ try {
         exit 1
     }
 
+    # Cleanup old backups pe DR (keep last 2 days)
+    Cleanup-OldBackupsOnDR -RetentionDays 2
+
     Write-Log "========================================="
     Write-Log "INCREMENTAL Backup Transfer Completed Successfully"
     Write-Log "========================================="