minimal example of working metrics

[iamkirkbater]

A minimal working example of metric collection using iamkirkbater/cobra-otel-metrics.

Marking this as a draft as I'd still like to finish adding some functionality to the cobra-otel-metrics package itself around the opt-in data controls. Additionally I'd like to get a working HTTP or GRPC collector working and test this "over the net". This is currently using a stdout exporter, which just creates a bunch of, what would be best considered "noise" to the average person, but here is what the metric would look like for a osdctl cluster context --cluster-id command invocation:

{
  "Resource": [{"Key":"service.name","Value":{"Type":"STRING","Value":"osdctl"}}],
  "ScopeMetrics":[{
    "Scope":{"Name":"cobra-otel-metrics","Version":"","SchemaURL":"","Attributes":null},
    "Metrics":[{
      "Name":"cluster-context",
      "Description":"Command Invocation",
      "Unit":"1",
      "Data":{
        "DataPoints":[{
          "Attributes":[
            {"Key":"cluster-id","Value":{"Type":"INT64","Value":1}},
            {"Key":"tty","Value":{"Type":"BOOL","Value":true}}
          ],
          "StartTime":"2025-08-04T10:15:29.409684-04:00",
          "Time":"2025-08-04T10:15:31.405611-04:00",
          "Value":1
        }],
        "Temporality":"CumulativeTemporality",
        "IsMonotonic":true
      }
    }]
  }]
}

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