T008: [P] Create CertificateVerification entity

[Hemavathi15sg]

Phase 2: Foundational

Task: T008
Status: Not Started
Story: Foundational (blocking all user stories)
Parallelizable: Yes - independent from T007, T009-T010

Description

Create CertificateVerification entity for verification audit trail tracking (rate limiting, analytics).

Acceptance Criteria

• File created: api/CourseRegistration.Domain/Entities/CertificateVerification.cs
• All 8 properties implemented (see data-model.md table):
  • VerificationId (Guid, PK)
  • CertificateId (Guid, FK)
  • VerificationTimestamp (datetime2, UTC)
  • VerifierIP (string, 1-45 chars)
  • VerificationMethod (enum: QRScan, URLDirect, API)
  • VerificationPathRequested (string, nullable)
  • WasValid (bit)
  • UserAgent (string, nullable)
  • CreatedUtc (datetime2)
  • IsDeleted (bit, soft delete)
• IP address validation method implemented
• Enum VerificationMethod properly defined
• XML documentation on public members

Effort Estimate

2.5 hours

References

• data-model.md: CertificateVerification Entity section