Add Startup Events to Database

Now emit startup events on conneciton
Some events still to add

ObservatoryFramework/Files/Journal/Exploration/CodexEntry.cs

@@ -71,7 +71,7 @@ public class CodexEntry : JournalBase
     /// <summary>
     /// List of trais of the scanned item.
     /// </summary>
-    public ImmutableList<string> Traits { get; init; }
+    public ICollection<string> Traits { get; init; }
     /// <summary>
     /// Value of the codex entry when sold to Universal Cartographics.
     /// </summary>

ObservatoryFramework/Files/Journal/Exploration/MultiSellExplorationData.cs

@@ -12,7 +12,7 @@ public class MultiSellExplorationData : JournalBase
     /// <summary>
     /// List of all sold first discoveries.
     /// </summary>
-    public ImmutableList<Discovered> Discovered { get; init; }
+    public IReadOnlyCollection<Discovered> Discovered { get; init; }
     /// <summary>
     /// Base value of total sold data.
     /// </summary>

ObservatoryFramework/Files/Journal/Exploration/SAAScanComplete.cs

@@ -23,11 +23,11 @@ public class SAAScanComplete : JournalBase
     /// <summary>
     /// This property is indicated with strikethrough in Frontier's documentation and is likely unused.
     /// </summary>
-    public ImmutableList<string> Discoverers { get; init; }
+    public ICollection<string> Discoverers { get; init; }
     /// <summary>
     /// This property is indicated with strikethrough in Frontier's documentation and is likely unused.
     /// </summary>
-    public ImmutableList<string> Mappers { get; init; }
+    public ICollection<string> Mappers { get; init; }
     /// <summary>
     /// Number of probes fired to complete the surface scan.
     /// </summary>

ObservatoryFramework/Files/Journal/Exploration/SAASignalsFound.cs

@@ -24,9 +24,9 @@ public class SAASignalsFound : JournalBase
     /// <summary>
     /// List of signals found.
     /// </summary>
-    public ImmutableList<Signal> Signals { get; init; }
+    public IReadOnlyCollection<Signal> Signals { get; init; }
     /// <summary>
     /// List of genuses present.
     /// </summary>
-    public ImmutableList<GenusType> Genuses { get; init; }
+    public IReadOnlyCollection<GenusType> Genuses { get; init; }
 }

ObservatoryFramework/Files/Journal/Exploration/Scan.cs

@@ -22,7 +22,7 @@ public class Scan : ScanBaryCentre
     /// <summary>
     /// List which reflects Frontier's JSON structure for the "Parents" object. Use of Parent property is recommended instead.
     /// </summary>
-    public ImmutableList<Parent> Parents { 
+    public IReadOnlyCollection<Parent> Parents { 
         get => _Parents; 
         init
         {
@@ -43,15 +43,16 @@ public class Scan : ScanBaryCentre
                         ParentList.Add((ParentType.Star, parent.Star.GetValueOrDefault(0)));
                     }
                 }
-                Parent = ParentList.ToImmutableList();
-            }           
+
+                Parent = ParentList;
+        }           
     }
     /// <summary>
     /// "Parents" object rearranged into more intuitive structure for ease of use.
     /// </summary>
     [JsonIgnore]
-    public ImmutableList<(ParentType ParentType, int Body)> Parent { get; init; }
-    private ImmutableList<Parent> _Parents;
+    public IReadOnlyCollection<(ParentType ParentType, int Body)> Parent { get; init; }
+    private IReadOnlyCollection<Parent> _Parents;
     /// <summary>
     /// Body distance from system arrival point in light-seconds.
     /// </summary>
@@ -79,7 +80,7 @@ public class Scan : ScanBaryCentre
     /// <summary>
     /// List containing full breakdown of atmospheric components and their relative percentages.
     /// </summary>
-    public ImmutableList<MaterialComposition> AtmosphereComposition { get; init; }
+    public IReadOnlyCollection<MaterialComposition> AtmosphereComposition { get; init; }
     /// <summary>
     /// Descriptive string for type of volcanism present, or an empty string for none, e.g. "major silicate vapour geysers volcanism".
     /// </summary>
@@ -112,7 +113,7 @@ public class Scan : ScanBaryCentre
     /// List containing full breakdown of prospectable surface materials and their relative percentages.
     /// </summary>
     [JsonConverter(typeof(MaterialCompositionConverter))]
-    public ImmutableList<MaterialComposition> Materials { get; init; }
+    public IReadOnlyCollection<MaterialComposition> Materials { get; init; }
     /// <summary>
     /// Overall composition of body, expressed as percentages of ice, rock, and metal.
     /// </summary>
@@ -129,7 +130,7 @@ public class Scan : ScanBaryCentre
     /// <summary>
     /// List of all planetary or stellar ring systems around the body.
     /// </summary>
-    public ImmutableList<Ring> Rings { get; init; }
+    public IReadOnlyCollection<Ring> Rings { get; init; }
     /// <summary>
     /// Description of the minable material abundance.<br/>Possible values inclue "PristineResources", "MajorResources", "CommonResources", "LowResources", and "DepletedResources". 
     /// </summary>

ObservatoryFramework/Files/Journal/Exploration/SellExplorationData.cs

@@ -11,11 +11,11 @@ public class SellExplorationData : JournalBase
     /// <summary>
     /// List of systems for which data was sold.
     /// </summary>
-    public ImmutableList<string> Systems { get; init; }
+    public ICollection<string> Systems { get; init; }
     /// <summary>
     /// List of first discovered bodies.
     /// </summary>
-    public ImmutableList<string> Discovered { get; init; }
+    public ICollection<string> Discovered { get; init; }
     /// <summary>
     /// Base value of sold data.
     /// </summary>