Heimdall: Add id column to player session tracking.

foundation-heimdall/src/main/kotlin/cloud/kubelet/foundation/heimdall/event/PlayerSession.kt

@@ -15,6 +15,7 @@ class PlayerSession(
   override fun store(transaction: Transaction) {
     transaction.apply {
       PlayerSessionTable.insert {
+        it[id] = UUID.randomUUID()
         it[player] = playerUniqueIdentity
         it[name] = playerName
         it[startTime] = startTimeInstant

foundation-heimdall/src/main/kotlin/cloud/kubelet/foundation/heimdall/table/PlayerSessionTable.kt

@@ -4,6 +4,7 @@ import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.javatime.timestamp
 
 object PlayerSessionTable : Table("player_sessions") {
+  val id = uuid("id")
   val player = uuid("player")
   val name = text("name")
   val startTime = timestamp("start")