Add XML documentation across gateway, worker, and .NET client

src/MxGateway.Server/Galaxy/GalaxyRepository.cs

@@ -10,6 +10,8 @@ namespace MxGateway.Server.Galaxy;
 /// </summary>
 public sealed class GalaxyRepository(GalaxyRepositoryOptions options)
 {
+    /// <summary>Tests the connection to the Galaxy Repository database.</summary>
+    /// <param name="ct">Token to cancel the asynchronous operation.</param>
     public async Task<bool> TestConnectionAsync(CancellationToken ct = default)
     {
         try
@@ -24,6 +26,8 @@ public sealed class GalaxyRepository(GalaxyRepositoryOptions options)
         catch (InvalidOperationException) { return false; }
     }
 
+    /// <summary>Retrieves the last deployment time from the Galaxy Repository.</summary>
+    /// <param name="ct">Token to cancel the asynchronous operation.</param>
     public async Task<DateTime?> GetLastDeployTimeAsync(CancellationToken ct = default)
     {
         using SqlConnection conn = new(options.ConnectionString);
@@ -34,6 +38,8 @@ public sealed class GalaxyRepository(GalaxyRepositoryOptions options)
         return result is DateTime dt ? dt : null;
     }
 
+    /// <summary>Retrieves the complete hierarchy of Galaxy objects from the repository.</summary>
+    /// <param name="ct">Token to cancel the asynchronous operation.</param>
     public async Task<List<GalaxyHierarchyRow>> GetHierarchyAsync(CancellationToken ct = default)
     {
         List<GalaxyHierarchyRow> rows = new();
@@ -70,6 +76,8 @@ public sealed class GalaxyRepository(GalaxyRepositoryOptions options)
         return rows;
     }
 
+    /// <summary>Retrieves all attributes for Galaxy objects from the repository.</summary>
+    /// <param name="ct">Token to cancel the asynchronous operation.</param>
     public async Task<List<GalaxyAttributeRow>> GetAttributesAsync(CancellationToken ct = default)
     {
         List<GalaxyAttributeRow> rows = new();