fix: add input guards to EventService to match TDD test expectations

Tests assert null-payload and blank-error-message guards but the
implementation had none. Added Objects.requireNonNull for payload
and blank check for errorMessage. Also added missing objectMapper
field to locale copies.

docs/ja-JP/skills/quarkus-patterns/SKILL.md

@@ -154,8 +154,10 @@ public class ProcessingService {
 @RequiredArgsConstructor
 public class EventService {
     private final EventRepository eventRepository;
+    private final ObjectMapper objectMapper;
     
     public void createSuccessEvent(Object payload, String eventType) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.SUCCESS);
@@ -167,6 +169,10 @@ public class EventService {
     }
     
     public void createErrorEvent(Object payload, String eventType, String errorMessage) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
+        if (errorMessage == null || errorMessage.isBlank()) {
+            throw new IllegalArgumentException("Error message cannot be blank");
+        }
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.ERROR);

docs/tr/skills/quarkus-patterns/SKILL.md

@@ -154,8 +154,10 @@ public class ProcessingService {
 @RequiredArgsConstructor
 public class EventService {
     private final EventRepository eventRepository;
+    private final ObjectMapper objectMapper;
     
     public void createSuccessEvent(Object payload, String eventType) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.SUCCESS);
@@ -167,6 +169,10 @@ public class EventService {
     }
     
     public void createErrorEvent(Object payload, String eventType, String errorMessage) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
+        if (errorMessage == null || errorMessage.isBlank()) {
+            throw new IllegalArgumentException("Error message cannot be blank");
+        }
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.ERROR);

docs/zh-CN/skills/quarkus-patterns/SKILL.md

@@ -154,8 +154,10 @@ public class ProcessingService {
 @RequiredArgsConstructor
 public class EventService {
     private final EventRepository eventRepository;
+    private final ObjectMapper objectMapper;
     
     public void createSuccessEvent(Object payload, String eventType) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.SUCCESS);
@@ -167,6 +169,10 @@ public class EventService {
     }
     
     public void createErrorEvent(Object payload, String eventType, String errorMessage) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
+        if (errorMessage == null || errorMessage.isBlank()) {
+            throw new IllegalArgumentException("Error message cannot be blank");
+        }
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.ERROR);

skills/quarkus-patterns/SKILL.md

@@ -159,6 +159,7 @@ public class EventService {
     private final ObjectMapper objectMapper;
     
     public void createSuccessEvent(Object payload, String eventType) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.SUCCESS);
@@ -170,6 +171,10 @@ public class EventService {
     }
     
     public void createErrorEvent(Object payload, String eventType, String errorMessage) {
+        Objects.requireNonNull(payload, "Payload cannot be null");
+        if (errorMessage == null || errorMessage.isBlank()) {
+            throw new IllegalArgumentException("Error message cannot be blank");
+        }
         Event event = new Event();
         event.setType(eventType);
         event.setStatus(EventStatus.ERROR);