Summary

This PR fixes log_to_metric transform to correctly handle metrics with a value type of MetricValue::AggregatedHistogram or MetricValue::AggregatedSummary.

See #24393

Vector configuration

[sources.opentelemetry]
type = "opentelemetry"
grpc.address = "0.0.0.0:4317"
http.address = "0.0.0.0:4318"

[transforms.my_metric_to_log]
type = "metric_to_log"
inputs = ["opentelemetry.metrics"]

[transforms.my_log_to_metric]
type = "log_to_metric"
inputs = [ "my_metric_to_log" ]
all_metrics = true
metrics = []

How did you test this PR?

1. Set up a graph as shown above.
2. Posted an OTEL Summary metric.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

Is this a breaking change?

• Yes
• No

Does this PR include user facing changes?

• Yes. Please add a changelog fragment based on our guidelines.
• No. A maintainer will apply the no-changelog label to this PR.

References

• Closes: log_to_metric: Histogram and summary metrics are converted incorrectly #24393