Add messaging.destination.partition.id to metric attributes (open-telemetry#814)

Author: lmolkova

.chloggen/814.yaml

@@ -0,0 +1,4 @@
+change_type: enhancement
+component: messaging
+note: Adds `messaging.destination.partition.id`` to the messaging attributes
+issues: [ 814 ]

docs/messaging/messaging-metrics.md

@@ -37,6 +37,7 @@ All messaging metrics share the same set of attributes:
 | [`messaging.destination.name`](../attributes-registry/messaging.md) | string | The message destination name [3] | `MyQueue`; `MyTopic` | `Conditionally Required` [4] | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`messaging.destination.template`](../attributes-registry/messaging.md) | string | Low cardinality representation of the messaging destination name [5] | `/customers/{customerId}` | `Conditionally Required` if available. | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`server.address`](../attributes-registry/server.md) | string | Server domain name if available without reverse DNS lookup; otherwise, IP address or Unix domain socket name. [6] | `example.com`; `10.1.2.80`; `/tmp/my.sock` | `Conditionally Required` If available. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
+| [`messaging.destination.partition.id`](../attributes-registry/messaging.md) | string | The identifier of the partition messages are sent to or received from, unique within the `messaging.destination.name`. | `1` | `Recommended` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |
 | [`server.port`](../attributes-registry/server.md) | int | Server port number. [7] | `80`; `8080`; `443` | `Recommended` | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
 
 **[1]:** The `error.type` SHOULD be predictable and SHOULD have low cardinality.

model/messaging-common.yaml

@@ -6,6 +6,7 @@ groups:
     attributes:
       - ref: messaging.system
         requirement_level: required
+      - ref: messaging.destination.partition.id
       - ref: error.type
         examples: ['amqp:decode-error', 'KAFKA_STORAGE_ERROR', 'channel-error']
         requirement_level: