🔧 Update Go version in go.mod and enhance build process with versioning information. Modify Makefile and Taskfile to inject build metadata (version, commit, build time) into the binary. Improve README with instructions for custom version builds and document new build info features. Add benchmarks for message parsing and processing to improve performance testing capabilities.

internal/infra/nats/consumer_jetstream.go

@@ -32,6 +32,7 @@ func (c *Consumer) createPullSubscriptionWithRecovery() (*nats.Subscription, err
 	return c.consumerManager.CreatePullSubscriptionWithRecovery(c.streamManager, consumerConfig)
 }
 
+//nolint:unused // Reserved for potential future use or alternative implementation
 // nakWithStrategy sends a NAK with appropriate delay based on retry attempt.
 func (c *Consumer) nakWithStrategy(msg *nats.Msg) error {
 	backoff := c.cfg.NATS.ConsumerRules.Backoff
@@ -74,6 +75,7 @@ func sleepWithContext(ctx context.Context, duration time.Duration) bool {
 	}
 }
 
+//nolint:unused // Reserved for potential future use or alternative implementation
 // fetchBatch fetches a batch of messages from the subscription.
 // It respects context cancellation for faster shutdown.
 func (c *Consumer) fetchBatch(ctx context.Context, sub *nats.Subscription) ([]*nats.Msg, error) {
@@ -102,7 +104,11 @@ func (c *Consumer) handleFetchError(ctx context.Context, err error, sub **nats.S
 		if recErr := c.recoverJetStreamResources(); recErr != nil {
 			return nil, recErr
 		}
-		(*sub).Unsubscribe()
+		if *sub != nil {
+			if unsubErr := (*sub).Unsubscribe(); unsubErr != nil {
+				c.logger.Error("Failed to unsubscribe during recovery", zap.Error(unsubErr))
+			}
+		}
 		return c.createPullSubscriptionWithRecovery()
 	})
 
@@ -125,10 +131,12 @@ func (c *Consumer) startJetStream(ctx context.Context) error {
 	// Use a closure that always cleans up the current subscription.
 	// When subscription is replaced in handleFetchError, this will clean up
 	// whatever currentSub points to at shutdown time.
-	var currentSub *nats.Subscription = sub
+	var currentSub = sub
 	cleanupSubscriber := func() {
 		if currentSub != nil {
-			currentSub.Unsubscribe()
+			if err := currentSub.Unsubscribe(); err != nil {
+				c.logger.Error("Failed to unsubscribe subscription", zap.Error(err))
+			}
 			currentSub = nil
 		}
 	}
@@ -174,14 +182,14 @@ func (c *Consumer) startJetStream(ctx context.Context) error {
 		}
 
 		// Fetch messages in batch
-		msgs, err := c.fetchBatch(ctx, currentSub)
+		msgs, err := c.fetcher.FetchBatch(ctx, currentSub)
 		if err != nil {
 			// If context was cancelled, return immediately
 			if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
 				c.logger.Info("Stopping consumer due to context cancellation", zap.Error(err))
 				return err
 			}
-			shouldContinue, handleErr := c.handleFetchError(ctx, err, &currentSub, &fetchErrorStreak)
+			shouldContinue, handleErr := c.fetcher.HandleFetchError(ctx, err, &currentSub, &fetchErrorStreak)
 			if !shouldContinue {
 				return handleErr
 			}
@@ -194,6 +202,6 @@ func (c *Consumer) startJetStream(ctx context.Context) error {
 		}
 
 		// Process batch
-		c.processBatch(ctx, msgs)
+		c.batchProcessor.ProcessBatch(ctx, msgs)
 	}
 }