Use the spec-recommended 10000ms default interval for the stdout exporter

[kaylareopelle]

Spec requirement

The stdout exporter SHOULD pair with a periodic exporting MetricReader using a default exportIntervalMilliseconds of 10000 for this exporter specifically (sdk_exporters/stdout.md:40-46).

Current behavior

configurator_patch.rb:37 (permalink) wires ConsoleMetricPullExporter into a PeriodicMetricReader.new(exporter: ...) correctly, but PeriodicMetricReader's interval defaults to OTEL_METRIC_EXPORT_INTERVAL/60000 (export/periodic_metric_reader.rb:25 (permalink)), the general default — nothing special-cases the console exporter's interval to 10000ms.

Suggested fix

When wiring the console exporter's default PeriodicMetricReader in configurator_patch.rb, pass export_interval_millis: 10_000 explicitly rather than relying on the general-purpose default.

Related rows in SPEC_COMPLIANCE_METRICS.md

STDOUT-3

[Abhayanthk]

Hi @kaylareopelle, I'd like to take this one — I'll go ahead and raise a PR shortly. Please assign it to me if that's alright.

[Abhayanthk]

@kaylareopelle
While working on it, I noticed the code had already changed since you opened this issue. PR #2301 (by @xuan-cao-swi) added a 10,000ms fallback for the console exporter, but it still read the general OTEL_METRIC_EXPORT_INTERVAL env var (ENV['OTEL_METRIC_EXPORT_INTERVAL'] || 10_000). So the console exporter's interval could still be overridden by that global setting, which isn't quite what the spec wants.

My PR removes that env var fallback and passes export_interval_millis: 10_000.0 directly, so the console exporter always runs every 10 seconds regardless of the global OTEL_METRIC_EXPORT_INTERVAL — decoupled from the general default, as the spec describes.