fix: Make sure we use @Inject on @ConfigProperty (#438)

Jakarta needs this or it ignores the config

Upstream: #437

Author: kabir

examples/cloud-deployment/server/src/main/java/io/a2a/examples/cloud/CloudAgentCardProducer.java

@@ -6,6 +6,8 @@
 import io.a2a.spec.AgentSkill;
 import jakarta.enterprise.context.ApplicationScoped;
 import jakarta.enterprise.inject.Produces;
+import jakarta.inject.Inject;
+
 import org.eclipse.microprofile.config.inject.ConfigProperty;
 
 import java.util.Collections;
@@ -17,6 +19,7 @@
 @ApplicationScoped
 public class CloudAgentCardProducer {
 
+    @Inject
     @ConfigProperty(name = "agent.url", defaultValue = "http://localhost:8080")
     String agentUrl;
 

extras/task-store-database-jpa/src/main/java/io/a2a/extras/taskstore/database/jpa/JpaDatabaseTaskStore.java

@@ -34,6 +34,7 @@ public class JpaDatabaseTaskStore implements TaskStore, TaskStateProvider {
     @Inject
     Event<TaskFinalizedEvent> taskFinalizedEvent;
 
+    @Inject
     @ConfigProperty(name = "a2a.replication.grace-period-seconds", defaultValue = "15")
     long gracePeriodSeconds;