[WIP] Complete milestone 2 for patient registration and demographics

[Copilot]

• Explore repository structure, existing code patterns, and Milestone 2 requirements
• Backend: Database migrations — Create Flyway migrations for patient, mother, and related tables
• Backend: Domain entities — Patient, Mother, MultipleBirth enums (DeliveryMethod, BloodType, etc.)
• Backend: DTOs — PatientCreateDto, PatientDto, PatientSearchDto, MotherDto
• Backend: Repository — PatientRepository with search/lookup queries
• Backend: Service — PatientService with registration, search, MRN generation
• Backend: Controller — PatientController REST API (/api/v1/patients)
• Backend: Unit tests — 100% coverage for all new backend code
• Backend: Build verification — Ensure build passes with checkstyle + JaCoCo 100% coverage
• Frontend: Models — TypeScript interfaces for Patient, Mother, etc.
• Frontend: Patient service — HTTP service for patient API calls
• Frontend: Patient registration component — Form with all neonatal fields
• Frontend: Patient search component — Search by MRN, name, bed, admission date
• Frontend: Patient detail component — Demographic summary view
• Frontend: Routes and navigation — Wire up patient feature routes
• Frontend: Unit tests — 100% coverage for all new frontend code
• Frontend: Build verification — Ensure build + tests pass
• Update MILESTONES.md to mark Milestone 2 deliverables as complete
• Final code review and security scan

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