Added framework xml documentation for all "exploration" events.

ObservatoryFramework/Files/Journal/Exploration/MultiSellExplorationData.cs

@@ -3,11 +3,26 @@ using System.Collections.Immutable;
 
 namespace Observatory.Framework.Files.Journal
 {
+    /// <summary>
+    /// Event generated when discovery data for multiple systems are sold at once.
+    /// </summary>
     public class MultiSellExplorationData : JournalBase
     {
+        /// <summary>
+        /// List of all sold first discoveries.
+        /// </summary>
         public ImmutableList<Discovered> Discovered { get; init; }
+        /// <summary>
+        /// Base value of total sold data.
+        /// </summary>
         public long BaseValue { get; init; }
+        /// <summary>
+        /// Bonus value added to base amount.
+        /// </summary>
         public long Bonus { get; init; }
+        /// <summary>
+        /// Total amount earned by CMDR for data sale.
+        /// </summary>
         public long TotalEarnings { get; init; }
 
     }