✨ Add repository guidelines and enhance documentation for project structure, build commands, coding standards, and testing practices. Introduce AGENTS.md for contributor guidance, update README.md to reference new guidelines, and improve configuration documentation for NATS modes. Update Makefile and Taskfile with clearer run commands and requirements for development and production modes. Add production deployment guide and improve logging configuration for better observability.

internal/infra/nats/metrics_test.go

@@ -0,0 +1,57 @@
+package nats
+
+import (
+	"context"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"github.com/nats-io/nats.go"
+	"go.uber.org/zap/zaptest"
+)
+
+var _ = Describe("Metrics", func() {
+	var (
+		c   *Consumer
+		ctx context.Context
+	)
+
+	BeforeEach(func() {
+		ctx = context.Background()
+		c = &Consumer{
+			streamName:   "TEST_STREAM",
+			consumerName: "test-consumer",
+			logger:       zaptest.NewLogger(GinkgoT()),
+		}
+	})
+
+	Describe("initMetrics", func() {
+		It("initializes metrics without error", func() {
+			c.initMetrics()
+			Expect(c.meter).NotTo(BeNil())
+		})
+	})
+
+	Describe("recordConsumerMetrics", func() {
+		It("handles nil ConsumerInfo gracefully", func() {
+			c.initMetrics()
+			c.recordConsumerMetrics(ctx, nil)
+			// Should not panic
+		})
+
+		It("records metrics when ConsumerInfo is provided", func() {
+			c.initMetrics()
+			info := &nats.ConsumerInfo{
+				Config: nats.ConsumerConfig{},
+				Delivered: nats.SequenceInfo{
+					Consumer: 50,
+					Stream:   100,
+				},
+			}
+			// Set fields directly (they are exported)
+			// Note: ConsumerInfo fields may not all be exported, so we test what we can
+			c.recordConsumerMetrics(ctx, info)
+			// Should not panic
+		})
+	})
+})
+