What is the bug?

When the Mimir OTLP endpoint converts an OTLP request to the Mimir equivalent, it generates a target_info time series for each resource contained in the request. However, for every resource, it only generates a target_info sample for the latest timestamp of all data points (samples).

How to reproduce it?

Send a request to Mimir's OTLP endpoint, containing several samples for the same metric. You should see that target_info only starts at the time of the last sample in the metric.

What did you think would happen?

I would expect for target_info samples to start at the same time as the metric itself.

What was your environment?

Grafana Cloud.

Any additional context to share?

No response