Merge branch 'pratik/otel-phase8-log-correlation' into pratik/otel-phase9-metric-gap-fill

# Conflicts:
#	docker/telemetry/grafana/dashboards/rpc-pathfinding.json
#	src/libxrpl/telemetry/Telemetry.cpp

include/xrpl/beast/insight/Unit.h

@@ -66,4 +66,29 @@ otelUnitCode(Unit unit) noexcept
     return "ms";
 }
 
+/**
+ * @brief Human-readable description for an instrument of this unit.
+ *
+ * Exported alongside the metric, so this is the text an operator reads in a
+ * metric catalogue. A byte-valued instrument that describes itself as a
+ * duration is exactly the confusion this whole type exists to remove, so the
+ * description is derived from the unit rather than written out at each
+ * instrument site.
+ *
+ * @param unit The unit to describe.
+ * @return A static, null-terminated description.
+ */
+constexpr char const*
+otelUnitDescription(Unit unit) noexcept
+{
+    switch (unit)
+    {
+        case Unit::Bytes:
+            return "Size in bytes";
+        case Unit::Millis:
+            break;
+    }
+    return "Duration in ms";
+}
+
 }  // namespace beast::insight