Added new endpoints to sync the list of games from steam if a user logged in.

pom.xml

@@ -17,6 +17,7 @@
         <jwt.version>0.13.0</jwt.version>
         <testcontainers.version>1.21.4</testcontainers.version>
         <archunit.version>1.4.1</archunit.version>
+        <resilience4j.version>2.2.0</resilience4j.version>
     </properties>
     <dependencies>
         <!-- Spring -->
@@ -45,6 +46,12 @@
             <groupId>com.github.ben-manes.caffeine</groupId>
             <artifactId>caffeine</artifactId>
         </dependency>
+        <!-- Resilience: retry + rate limiter for outbound Steam calls -->
+        <dependency>
+            <groupId>io.github.resilience4j</groupId>
+            <artifactId>resilience4j-spring-boot3</artifactId>
+            <version>${resilience4j.version}</version>
+        </dependency>
         <!-- JWT -->
         <dependency>
             <groupId>io.jsonwebtoken</groupId>