Update program of study to handle null values.

src/app/dars/metadata-table/metadata-table.component.html

@@ -30,7 +30,7 @@
     <!-- Program Column -->
     <ng-container matColumnDef="program">
       <th mat-header-cell *matHeaderCellDef>Program of Study</th>
-      <td mat-cell *matCellDef="let audit" class="program-cell">{{audit.darsDegreeProgramDescription.toLowerCase()}}</td>
+      <td mat-cell *matCellDef="let audit" class="program-cell">{{(audit.darsDegreeProgramDescription || '').toLowerCase()}}</td>
     </ng-container>
 
     <!-- Honors Column -->

src/app/dars/models/audit-metadata.ts

@@ -5,6 +5,7 @@ export interface AuditMetadata {
   darsInstitutionCode: string;
   darsInstitutionCodeDescription: string;
   darsDegreeProgramCode: string;
+  darsDegreeProgramDescription?: string;
   darsStatusOfDegreeAuditRequest: string;
   darsHonorsOptionCode: string;
   darsHonorsOptionDescription: string;