- Add getTasks() method with status filtering (all, open, completed, failed) to AbdmWorkTaskService
- Enhance AbdmTaskBoard to enrich all task types with health_records, invoice_code, and care contexts
- Add status toggle filter buttons (All, Open, Completed) with dynamic count badges to Task Board UI
- Add real-time fuzzy/keyword search input for instant filtering by invoice ID, patient name, ABHA, or task code
- Render completed/linked tasks with green LINKED badge, gateway reference, and FHIR Preview button
- Add unit tests in AbdmTaskBoardBackfillTest