Initial commit: TrueCV CV verification platform

Clean architecture solution with:
- Domain: Entities (User, CVCheck, CVFlag, CompanyCache) and Enums
- Application: Service interfaces, DTOs, and models
- Infrastructure: EF Core, Identity, Hangfire, external API clients, services
- Web: Blazor Server UI with pages and components

Features:
- CV upload and parsing (PDF/DOCX) using Claude API
- Employment verification against Companies House API
- Timeline analysis for gaps and overlaps
- Veracity scoring algorithm
- Background job processing with Hangfire
- Azure Blob Storage for file storage

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

src/TrueCV.Domain/Entities/CVFlag.cs

@@ -0,0 +1,31 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using TrueCV.Domain.Enums;
+
+namespace TrueCV.Domain.Entities;
+
+public class CVFlag
+{
+    [Key]
+    public Guid Id { get; set; }
+
+    public Guid CVCheckId { get; set; }
+
+    public FlagCategory Category { get; set; }
+
+    public FlagSeverity Severity { get; set; }
+
+    [Required]
+    [MaxLength(256)]
+    public string Title { get; set; } = string.Empty;
+
+    [Required]
+    [MaxLength(2048)]
+    public string Description { get; set; } = string.Empty;
+
+    public int ScoreImpact { get; set; }
+
+    // Navigation property
+    [ForeignKey(nameof(CVCheckId))]
+    public CVCheck CVCheck { get; set; } = null!;
+}