fix: replace nil context with context.TODO

internal/server/request_context.go

@@ -0,0 +1,30 @@
+package server
+
+import (
+	"mal/internal/observability"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+)
+
+const requestIDHeader = "X-Request-ID"
+
+func RequestContextMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		requestID := strings.TrimSpace(c.GetHeader(requestIDHeader))
+		if requestID == "" {
+			requestID = uuid.NewString()
+		}
+
+		path := c.Request.URL.Path
+		route := c.FullPath()
+		if route == "" {
+			route = path
+		}
+
+		c.Writer.Header().Set(requestIDHeader, requestID)
+		c.Request = c.Request.WithContext(observability.WithRequestContext(c.Request.Context(), requestID, path, route))
+		c.Next()
+	}
+}