🔧 Update Go module dependencies and modify NATS configuration to exclusively support JetStream mode. Upgrade go.uber.org/zap to version 1.27.1 and golang.org/x/crypto to version 0.45.0. Revise Makefile and documentation to reflect changes in NATS mode, ensuring consistent messaging behavior across development and production environments. Enhance README and configuration files to clarify JetStream usage and remove references to Core NATS mode.

internal/infra/nats/publisher.go

@@ -20,8 +20,7 @@ type Publisher struct {
 	logger *zap.Logger
 }
 
-// ProvidePublisher creates a NATS publisher.
-// When js is nil (core mode), returns a CorePublisher that uses plain NATS.
+// ProvidePublisher creates a NATS JetStream publisher.
 func ProvidePublisher(
 	js nats.JetStreamContext,
 	nc *nats.Conn,
@@ -29,7 +28,7 @@ func ProvidePublisher(
 	logger *zap.Logger,
 ) (port.Publisher, error) {
 	if js == nil {
-		return ProvideCorePublisher(nc, cfg, logger)
+		return nil, fmt.Errorf("JetStream context is required")
 	}
 	return &Publisher{
 		js:     js,
@@ -38,63 +37,6 @@ func ProvidePublisher(
 	}, nil
 }
 
-// CorePublisher publishes messages to plain NATS (non-JetStream)
-type CorePublisher struct {
-	conn   *nats.Conn
-	cfg    *config.Config
-	logger *zap.Logger
-}
-
-// ProvideCorePublisher creates a NATS publisher for core mode
-func ProvideCorePublisher(
-	conn *nats.Conn,
-	cfg *config.Config,
-	logger *zap.Logger,
-) (port.Publisher, error) {
-	return &CorePublisher{
-		conn:   conn,
-		cfg:    cfg,
-		logger: logger,
-	}, nil
-}
-
-// Publish publishes a message using plain NATS
-func (p *CorePublisher) Publish(message any) error {
-	topic := p.cfg.Publisher.Topic
-	if topic == "" {
-		p.logger.Error("publisher topic is not configured")
-		return fmt.Errorf("publisher topic is not configured")
-	}
-
-	// Marshal message to JSON
-	messageBytes, err := json.Marshal(message)
-	if err != nil {
-		p.logger.Error("failed to marshal message",
-			zap.String("topic", topic),
-			zap.Error(err),
-		)
-		return fmt.Errorf("failed to marshal message: %w", err)
-	}
-
-	// Publish to plain NATS
-	err = p.conn.Publish(topic, messageBytes)
-	if err != nil {
-		p.logger.Error("failed to publish message",
-			zap.String("topic", topic),
-			zap.Int("message_size", len(messageBytes)),
-			zap.Error(err),
-		)
-		return fmt.Errorf("failed to publish message: %w", err)
-	}
-
-	p.logger.Debug("Published message",
-		zap.String("topic", topic),
-		zap.Int("size", len(messageBytes)),
-	)
-
-	return nil
-}
-
 // Publish publishes a message
 func (p *Publisher) Publish(message any) error {
 	topic := p.cfg.Publisher.Topic