docs: add XML doc comments across src + Sister Projects section in CLAUDE.md

Bulk CommentChecker pass: fills in <param>/<inheritdoc> tags on public
APIs across all 23 src/ projects so the doc-coverage gate is green. Also
adds a Sister Projects section to CLAUDE.md pointing at the MxAccess
Gateway and OtOpcUa sibling repos, and gitignores local credential
captures (*login*.txt) and the wonder-app-vd03 deploy/ artifacts.

src/ScadaLink.Commons/Entities/Deployment/DeploymentRecord.cs

@@ -4,14 +4,49 @@ namespace ScadaLink.Commons.Entities.Deployment;
 
 public class DeploymentRecord
 {
+    /// <summary>
+    /// The deployment record identifier.
+    /// </summary>
     public int Id { get; set; }
+
+    /// <summary>
+    /// The instance identifier being deployed.
+    /// </summary>
     public int InstanceId { get; set; }
+
+    /// <summary>
+    /// The current deployment status.
+    /// </summary>
     public DeploymentStatus Status { get; set; }
+
+    /// <summary>
+    /// The deployment identifier.
+    /// </summary>
     public string DeploymentId { get; set; }
+
+    /// <summary>
+    /// The revision hash of the deployed configuration, or null.
+    /// </summary>
     public string? RevisionHash { get; set; }
+
+    /// <summary>
+    /// The user who initiated the deployment.
+    /// </summary>
     public string DeployedBy { get; set; }
+
+    /// <summary>
+    /// The time when the deployment was initiated.
+    /// </summary>
     public DateTimeOffset DeployedAt { get; set; }
+
+    /// <summary>
+    /// The time when the deployment completed, or null if still in progress.
+    /// </summary>
     public DateTimeOffset? CompletedAt { get; set; }
+
+    /// <summary>
+    /// Error message if the deployment failed, or null.
+    /// </summary>
     public string? ErrorMessage { get; set; }
 
     /// <summary>
@@ -19,6 +54,11 @@ public class DeploymentRecord
     /// </summary>
     public byte[] RowVersion { get; set; } = [];
 
+    /// <summary>
+    /// Initializes a new instance of the DeploymentRecord.
+    /// </summary>
+    /// <param name="deploymentId">The deployment identifier.</param>
+    /// <param name="deployedBy">The user initiating the deployment.</param>
     public DeploymentRecord(string deploymentId, string deployedBy)
     {
         DeploymentId = deploymentId ?? throw new ArgumentNullException(nameof(deploymentId));