feat(redis): implement Redis integration for game state management and websocket communication

build.gradle.kts

@@ -46,7 +46,11 @@ val coverageExclusions = listOf(
     // AccountResource / ChallengeResource — REST integration layer; @QuarkusTest not instrumented by Scoverage
     "**/account/src/main/scala/de/nowchess/account/resource/**",
     // JacksonConfig / NativeReflectionConfig — Quarkus lifecycle hooks, no testable logic
-    "**/account/src/main/scala/de/nowchess/account/config/**"
+    "**/account/src/main/scala/de/nowchess/account/config/**",
+    // WebSocket service — infrastructure CDI beans (RedisConfig, RedissonProducer)
+    "**/ws/src/main/scala/de/nowchess/ws/config/**",
+    // GameWebSocketResource in core — replaced by ws module
+    "**/core/src/main/scala/de/nowchess/chess/resource/GameWebSocketResource.scala",
 )
 
 // Converts a Sonar-style glob to a scoverage regex (matched against full source path).
@@ -93,7 +97,8 @@ val versions = mapOf(
     "SCALA_PARSER_COMBINATORS" to "2.4.0",
     "FASTPARSE"             to "3.0.2",
     "JACKSON"               to "2.17.2",
-    "JACKSON_SCALA"         to "2.17.2"
+    "JACKSON_SCALA"         to "2.17.2",
+    "REDISSON"              to "3.32.0"
 )
 extra["VERSIONS"] = versions