>     private function enqueueIpdDischargeFhirSync(int $ipdId, int $patientId, array $ipdRow, array $patientRow): void
      {
          if ($ipdId <= 0 || $patientId <= 0) {
              return;
          }
  
          $hfrId = trim($this->getHospitalSettingValue('ABDM_HFR_ID'));
          if ($hfrId === '') {
              return;
          }
  
          $lastName = trim((string) ($patientRow['p_lname'] ?? ''));
          if (! $this->isMeaningfulDischargeValue($lastName)) {
              $lastName = '';
          }
          $patientName = trim(trim((string) ($patientRow['p_fname'] ?? '')) . ' ' . $lastName);
          if ($patientName === '') {
              $patientName = trim((string) ($ipdRow['P_name'] ?? ''));
          }
  
          $abhaIdRaw = '';
          foreach (['abha_id', 'abha_no', 'abha'] as $field) {
              $value = trim((string) ($patientRow[$field] ?? ''));
              if ($value !== '') {
                  $abhaIdRaw = $value;
                  break;
              }
          }
          if ($abhaIdRaw === '') {
              $abhaIdRaw = trim((string) ($patientRow['abha_address'] ?? ''));
          }
  
          $abhaDigits = preg_replace('/\D/', '', $abhaIdRaw);
          $abhaDigits = is_string($abhaDigits) ? $abhaDigits : '';
          $abhaAddress = trim((string) ($patientRow['abha_address'] ?? ''));
          if ($abhaAddress === '' && strpos($abhaIdRaw, '@') !== false) {
              $abhaAddress = $abhaIdRaw;
          }
  
          $admissionRaw = trim((string) ($ipdRow['register_date'] ?? ''));
          $dischargeRaw = trim((string) ($ipdRow['discharge_date'] ?? ''));
          $admissionIso = $this->toIsoDateTimeOrNow($admissionRaw);
          $dischargeIso = $this->toIsoDateTimeOrNow($dischargeRaw);
          $visitDate = $dischargeRaw !== ''
              ? date('Y-m-d', strtotime($dischargeRaw))
              : ($admissionRaw !== '' ? date('Y-m-d', strtotime($admissionRaw)) : date('Y-m-d'));
  
          $diagnosisRows = $this->byIpdRows('ipd_discharge_diagnosis', ['comp_report'], 'id ASC', $ipdId);
          $conditionRows = [];
          foreach ($diagnosisRows as $row) {
              $text = trim((string) ($row['comp_report'] ?? ''));
              if ($text !== '') {
                  $conditionRows[] = ['text' => $text, 'code' => ''];
              }
          }
  
          $chiefComplaintsList = [];
          if ($this->tableHasColumns('ipd_discharge_complaint', ['ipd_id', 'comp_report'])) {
              $complaintRows = $this->byIpdRows('ipd_discharge_complaint', ['comp_report', 'comp_remark'], 'id ASC', 
$ipdId);
              foreach ($complaintRows as $row) {
                  $term = trim((string) ($row['comp_report'] ?? ''));
                  $duration = trim((string) ($row['comp_remark'] ?? ''));
                  if ($term !== '') {
                      $text = $term . ($duration !== '' ? (' - ' . $duration) : '');
                      $chiefComplaintsList[] = ['text' => $text, 'code' => ''];
                  }
              }
          }
  
          $complaintRemarkText = '';
          if ($this->tableHasColumns('ipd_discharge_complaint_remark', ['ipd_id', 'comp_remark'])) {
              $complaintRemarkRow = $this->firstRowByIpd('ipd_discharge_complaint_remark', $ipdId);
              $complaintRemarkText = trim((string) ($complaintRemarkRow['comp_remark'] ?? ''));
          }
  
          if (empty($chiefComplaintsList) && $complaintRemarkText !== '') {
              $chiefComplaintsList[] = ['text' => $complaintRemarkText, 'code' => ''];
          }
  
          $procedureRows = [];
          foreach ($this->byIpdRows('ipd_discharge_surgery', ['surgery_name', 'surgery_date'], 'id ASC', $ipdId) as 
$row) {
              $text = trim((string) ($row['surgery_name'] ?? ''));
              if ($text !== '') {
                  $procedureRows[] = [
                      'text' => $text,
                      'code' => '',
                      'performed_at' => $this->toIsoDateTimeOrNow(trim((string) ($row['surgery_date'] ?? ''))),
                  ];
              }
          }
          foreach ($this->byIpdRows('ipd_discharge_procedure', ['procedure_name', 'procedure_date'], 'id ASC', $ipdId) 
as $row) {
              $text = trim((string) ($row['procedure_name'] ?? ''));
              if ($text !== '') {
                  $procedureRows[] = [
                      'text' => $text,
                      'code' => '',
                      'performed_at' => $this->toIsoDateTimeOrNow(trim((string) ($row['procedure_date'] ?? ''))),
                  ];
              }
          }
  
          $medicationRows = [];
          $legacyMeds = $this->byIpdRows('ipd_discharge_prescrption_prescribed', ['med_name', 'dosage', 'dosage_when', 
'dosage_freq', 'no_of_days', 'remark'], 'id ASC', $ipdId);
          if (empty($legacyMeds)) {
              $legacyMeds = $this->byIpdRows('ipd_discharge_prescription_prescribed', ['med_name', 'dosage', 
'dosage_when', 'dosage_freq', 'no_of_days', 'remark'], 'id ASC', $ipdId);
          }
          foreach ($legacyMeds as $row) {
              $name = trim((string) ($row['med_name'] ?? ''));
              if (! $this->isMeaningfulDischargeValue($name)) {
                  continue;
              }
              $dose = $this->formatDischargeMedDirections(
                  $row['dosage'] ?? '',
                  $row['dosage_when'] ?? '',
                  $row['dosage_freq'] ?? '',
                  (string) ($row['no_of_days'] ?? ''),
                  (string) ($row['remark'] ?? '')
              );
              $medicationRows[] = ['name' => $name, 'dosage' => $dose];
          }
          if (empty($medicationRows)) {
              foreach ($this->byIpdRows('ipd_discharge_drug', ['drug_name', 'drug_dose', 'drug_day'], 'id ASC', 
$ipdId) as $row) {
                  $name = trim((string) ($row['drug_name'] ?? ''));
                  if (! $this->isMeaningfulDischargeValue($name)) {
                      continue;
                  }
                  $dose = trim(implode(' ', array_filter([
                      (string) ($row['drug_dose'] ?? ''),
                      (string) ($row['drug_day'] ?? ''),
                  ], fn ($v) => $this->isMeaningfulDischargeValue((string) $v))));
                  $medicationRows[] = ['name' => $name, 'dosage' => $dose];
              }
          }
  
          $observationRows = [];
          if ($this->tableHasColumns('ipd_discharge_1_b', ['ipd_d_id'])) {
              $cols = $this->db->getFieldNames('ipd_discharge_1_b') ?? [];
              $sel = in_array('short_head', $cols, true) ? 'short_head,rdata' : '*';
              foreach ($this->db->table('ipd_discharge_1_b')->select($sel)->where('ipd_d_id', 
$ipdId)->get()->getResultArray() as $row) {
                  $label = trim((string) ($row['short_head'] ?? ''));
                  $value = trim((string) ($row['rdata'] ?? ''));
                  if ($label === '' || ! $this->isMeaningfulDischargeValue($value)) {
                      continue;
                  }
                  $observationRows[] = [
                      'text' => $label,
                      'value' => $value,
                      'category' => 'Condition on Admission Time',
                      'category_code' => 'vital-signs',
                      'effective_at' => $admissionIso,
                  ];
              }
          }
          if ($this->tableHasColumns('ipd_discharge_1_b_final', ['ipd_d_id'])) {
              $cols = $this->db->getFieldNames('ipd_discharge_1_b_final') ?? [];
              $sel = in_array('short_head', $cols, true) ? 'short_head,rdata' : '*';
              foreach ($this->db->table('ipd_discharge_1_b_final')->select($sel)->where('ipd_d_id', 
$ipdId)->get()->getResultArray() as $row) {
                  $label = trim((string) ($row['short_head'] ?? ''));
                  $value = trim((string) ($row['rdata'] ?? ''));
                  if ($label === '' || ! $this->isMeaningfulDischargeValue($value)) {
                      continue;
                  }
                  $observationRows[] = [
                      'text' => $label,
                      'value' => $value,
                      'category' => 'Condition on Discharge Time',
                      'category_code' => 'vital-signs',
                      'effective_at' => $dischargeIso,
                  ];
              }
          }
  
          $investigationRows = [];
          if ($this->tableHasColumns('ipd_discharge_1_d', ['ipd_d_id'])) {
              $cols = $this->db->getFieldNames('ipd_discharge_1_d') ?? [];
              $sel = in_array('short_head', $cols, true) ? 'short_head,rdata' : '*';
              foreach ($this->db->table('ipd_discharge_1_d')->select($sel)->where('ipd_d_id', 
$ipdId)->get()->getResultArray() as $row) {
                  $label = trim((string) ($row['short_head'] ?? ''));
                  $value = trim((string) ($row['rdata'] ?? ''));
                  if ($label === '' || ! $this->isMeaningfulDischargeValue($value)) {
                      continue;
                  }
                  $investigationRows[] = [
                      'text' => $label . ': ' . $value,
                      'authored_on' => $admissionIso,
                  ];
              }
          }
          if ($this->tableHasColumns('ipd_discharge_1_e', ['ipd_d_id'])) {
              $cols = $this->db->getFieldNames('ipd_discharge_1_e') ?? [];
              $sel = in_array('short_head', $cols, true) ? 'short_head,rdata' : '*';
              foreach ($this->db->table('ipd_discharge_1_e')->select($sel)->where('ipd_d_id', 
$ipdId)->get()->getResultArray() as $row) {
                  $label = trim((string) ($row['short_head'] ?? ''));
                  $value = trim((string) ($row['rdata'] ?? ''));
                  if ($label === '' || ! $this->isMeaningfulDischargeValue($value)) {
                      continue;
                  }
                  $investigationRows[] = [
                      'text' => $label . ': ' . $value,
                      'authored_on' => $admissionIso,
                  ];