feat: add TTL to GameSessionStore, replay protection and session cleanup to evaluateAnswer

apps/api/src/gameSessionStore/GameSessionStore.ts

@@ -1,7 +1,11 @@
 export type GameSessionData = { answers: Map<string, number> };
 
 export interface GameSessionStore {
-  create(sessionId: string, data: GameSessionData): Promise<void>;
+  create(
+    sessionId: string,
+    data: GameSessionData,
+    ttlMs: number,
+  ): Promise<void>;
   get(sessionId: string): Promise<GameSessionData | null>;
   delete(sessionId: string): Promise<void>;
 }