feat: Add legal compliance changes

- Replace 'diploma mill' language with objective 'unaccredited institution' terminology
- Rename DiplomaMills.cs to UnaccreditedInstitutions.cs with neutral language
- Update EducationVerificationResult.IsUnaccredited property
- Update flag titles to 'Unaccredited Institution' and 'Institution Requires Verification'
- Add legal disclaimer to verification report page
- Add Privacy Policy page (/privacy) with UK GDPR compliance info
- Add Terms of Service page (/terms) with candidate notice requirements
- Add footer links to Privacy and Terms pages
- Update all tests to use new terminology

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

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

src/RealCV.Application/Models/EducationVerificationResult.cs

@@ -4,9 +4,9 @@ public sealed record EducationVerificationResult
 {
     public required string ClaimedInstitution { get; init; }
     public string? MatchedInstitution { get; init; }
-    public required string Status { get; init; }  // Recognised, NotRecognised, DiplomaMill, Suspicious, Unknown
+    public required string Status { get; init; }  // Recognised, NotRecognised, Unaccredited, Suspicious, Unknown
     public bool IsVerified { get; init; }
-    public bool IsDiplomaMill { get; init; }
+    public bool IsUnaccredited { get; init; }
     public bool IsSuspicious { get; init; }
     public string? VerificationNotes { get; init; }