feat: United SCO claim worker rewrite + eligibility/patient-table fixes

- Rewrote UnitedDH claim worker to navigate via eligibility page → Selected Patient → Submit Claim button flow
- Updated helpers_uniteddh_claim.py step names to match new 9-step workflow
- Changed payer selection in both eligibility and claim workers to type + Enter
- Updated patient table column header from 'DOB / Gender' to 'DOB'

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/Frontend/src/components/patients/patient-table.tsx

@@ -972,7 +972,7 @@ export function PatientTable({
             <TableRow>
               {allowCheckbox && <TableHead>Select</TableHead>}
               <TableHead>Patient</TableHead>
-              <TableHead>DOB / Gender</TableHead>
+              <TableHead>DOB</TableHead>
               {/*<TableHead>Contact</TableHead>*/}
               <TableHead>Insurance</TableHead>
               <TableHead>Status</TableHead>