Switch var to val

Hopefully this might sort the KSP issues we're seeing

Author: mikescamell

saved-sites/saved-sites-store/src/main/java/com/duckduckgo/savedsites/store/RoomEntities.kt

@@ -24,12 +24,12 @@ import java.util.UUID
 
 @Entity(tableName = "entities", primaryKeys = ["entityId"])
 data class Entity(
-    var entityId: String = UUID.randomUUID().toString(),
-    var title: String,
-    var url: String?,
-    var type: EntityType,
-    var lastModified: String? = DatabaseDateFormatter.iso8601(),
-    var deleted: Boolean = false,
+    val entityId: String = UUID.randomUUID().toString(),
+    val title: String,
+    val url: String?,
+    val type: EntityType,
+    val lastModified: String? = DatabaseDateFormatter.iso8601(),
+    val deleted: Boolean = false,
 )
 
 enum class EntityType {
@@ -58,6 +58,6 @@ class EntityTypeConverter {
 @Entity(tableName = "relations")
 data class Relation(
     @PrimaryKey(autoGenerate = true) val id: Int = 0,
-    var folderId: String = UUID.randomUUID().toString(),
-    var entityId: String,
+    val folderId: String = UUID.randomUUID().toString(),
+    val entityId: String,
 )