new two advisories and sprints work on them

src/VexHub/__Libraries/StellaOps.VexHub.Persistence/Postgres/Models/VexStatementEntity.cs

@@ -28,4 +28,26 @@ public sealed class VexStatementEntity
     public required DateTimeOffset IngestedAt { get; set; }
     public DateTimeOffset? UpdatedAt { get; set; }
     public required string ContentDigest { get; set; }
+
+    // ====== REKOR LINKAGE FIELDS (Sprint: SPRINT_20260117_002_EXCITITOR_vex_rekor_linkage, VRL-002) ======
+
+    /// <summary>
+    /// Rekor entry UUID if this statement was attested to the transparency log.
+    /// </summary>
+    public string? RekorUuid { get; set; }
+
+    /// <summary>
+    /// Rekor log index for the attestation.
+    /// </summary>
+    public long? RekorLogIndex { get; set; }
+
+    /// <summary>
+    /// Time the attestation was integrated into Rekor.
+    /// </summary>
+    public DateTimeOffset? RekorIntegratedTime { get; set; }
+
+    /// <summary>
+    /// Stored inclusion proof for offline verification (JSON).
+    /// </summary>
+    public string? RekorInclusionProof { get; set; }
 }