add otel as separate module (#10)

Reviewed-on: #10
Co-authored-by: andrey <andrey@4devs.io>
Co-committed-by: andrey <andrey@4devs.io>

handler/otel/middleware.go

@@ -0,0 +1,16 @@
+package otel
+
+import (
+	"context"
+
+	"gitoa.ru/go-4devs/log"
+	"gitoa.ru/go-4devs/log/entry"
+)
+
+func Middleware() log.Middleware {
+	return func(ctx context.Context, e *entry.Entry, handler log.Logger) (int, error) {
+		addEvent(ctx, e)
+
+		return handler(ctx, e)
+	}
+}