Oracle DR: Add TestMode parameter for dual behavior

rman_restore_from_zero.ps1:
- Add -TestMode switch parameter
- TestMode (weekly DR test): Skip service/listener config, only verify restore works
- Standalone mode: Full config with SPFILE + Listener for production use

weekly-dr-test-proxmox.sh:
- Call restore script with -TestMode flag
- Avoids service recreation and SSH disconnect during tests

Benefits:
- Weekly tests are faster and cleaner (no service restart)
- Manual restore prepares system for production use
- No more 'Broken pipe' errors during tests

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

oracle/standby-server-scripts/weekly-dr-test-proxmox.sh

@@ -362,7 +362,7 @@ run_dr_test() {
             log "STEP 4: Running database restore"
 
             if ssh -p "$DR_VM_PORT" "$DR_VM_USER@$DR_VM_IP" \
-                "powershell -ExecutionPolicy Bypass -File D:\\oracle\\scripts\\rman_restore_from_zero.ps1" 2>&1 | tee -a "$LOG_FILE"; then
+                "powershell -ExecutionPolicy Bypass -File D:\\oracle\\scripts\\rman_restore_from_zero.ps1 -TestMode" 2>&1 | tee -a "$LOG_FILE"; then
 
                 local restore_end=$(date +%s)
                 restore_duration=$(( (restore_end - restore_start) / 60 ))