feat(core): publish GameOver event to Redis Streams (#64)

Add GameOver to EventType enum and GameOverPayload DTO.
GameRedisPublisher publishes to {prefix}:game-over stream (MAXLEN ~1000)
on game completion. NativeReflectionConfig updated for core module.

Closes NCS-102
https://knockoutwhist.youtrack.cloud/issue/NCS-102

Reviewed-on: #64

modules/api/src/main/scala/de/nowchess/api/event/EventType.scala

@@ -1,4 +1,4 @@
 package de.nowchess.api.event
 
 enum EventType:
-  case GameStart, GameCreationRequest, GameCreationResponse, BotGameStart, ChallengeCreated, ChallengeAccepted
+  case GameStart, GameCreationRequest, GameCreationResponse, BotGameStart, ChallengeCreated, ChallengeAccepted, GameOver

modules/api/src/main/scala/de/nowchess/api/event/GameOverPayload.scala

@@ -0,0 +1,9 @@
+package de.nowchess.api.event
+
+final case class GameOverPayload(
+    gameId: String,
+    result: String,
+    terminationReason: String,
+    whiteId: String,
+    blackId: String,
+)