feat: Add additional verification APIs (FCA, SRA, GitHub, OpenCorporates, ORCID)

This adds five new free API integrations for enhanced CV verification:

- FCA Register API: Verify financial services professionals
- SRA Register API: Verify solicitors and legal professionals
- GitHub API: Verify developer profiles and technical skills
- OpenCorporates API: Verify international companies across jurisdictions
- ORCID API: Verify academic researchers and publications

Includes:
- API clients for all five services with retry policies
- Service implementations with name matching and validation
- Models for verification results with detailed flags
- Configuration options in appsettings.json
- DI registration for all services

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/RealCV.Application/Models/AcademicVerificationResult.cs

@@ -0,0 +1,62 @@
+namespace RealCV.Application.Models;
+
+/// <summary>
+/// Result of verifying an academic researcher via ORCID
+/// </summary>
+public sealed record AcademicVerificationResult
+{
+    public required string ClaimedName { get; init; }
+    public required bool IsVerified { get; init; }
+
+    // ORCID profile
+    public string? OrcidId { get; init; }
+    public string? MatchedName { get; init; }
+    public string? OrcidUrl { get; init; }
+
+    // Academic affiliations
+    public List<AcademicAffiliation> Affiliations { get; init; } = [];
+
+    // Publications
+    public int TotalPublications { get; init; }
+    public List<Publication> RecentPublications { get; init; } = [];
+
+    // Education from ORCID
+    public List<AcademicEducation> Education { get; init; } = [];
+
+    public string? VerificationNotes { get; init; }
+    public List<AcademicVerificationFlag> Flags { get; init; } = [];
+}
+
+public sealed record AcademicAffiliation
+{
+    public required string Organization { get; init; }
+    public string? Department { get; init; }
+    public string? Role { get; init; }
+    public DateOnly? StartDate { get; init; }
+    public DateOnly? EndDate { get; init; }
+}
+
+public sealed record Publication
+{
+    public required string Title { get; init; }
+    public string? Journal { get; init; }
+    public int? Year { get; init; }
+    public string? Doi { get; init; }
+    public string? Type { get; init; }
+}
+
+public sealed record AcademicEducation
+{
+    public required string Institution { get; init; }
+    public string? Degree { get; init; }
+    public string? Subject { get; init; }
+    public int? Year { get; init; }
+}
+
+public sealed record AcademicVerificationFlag
+{
+    public required string Type { get; init; }
+    public required string Severity { get; init; }
+    public required string Message { get; init; }
+    public int ScoreImpact { get; init; }
+}